How popular is the baby name Theo in the United States right now? How popular was it historically? Use the popularity graph and data table below to find out! Plus, see all the blog posts that mention the name Theo.

The graph will take a few moments to load. (Don't worry, it shouldn't take 9 months!) If it's taking too long, try reloading the page.


Popularity of the baby name Theo


Posts that mention the name Theo

Popular and unique baby names in Austria, 2024

Flag of Austria
Flag of Austria

Last year, the European country of Austria welcomed 77,238 babies — 37,463 girls and 39,775 boys.

What were the most popular names among these babies? Emilia and Elias.

Here are Austria’s top 50 girl names and top 50 boy names of 2024:

Girl names

  1. Emilia, 534 baby girls
  2. Emma, 523
  3. Marie, 518
  4. Anna, 516
  5. Sophia, 488
  6. Mia, 462
  7. Lena, 433
  8. Valentina, 422
  9. Lea, 398
  10. Laura, 397
  11. Hannah, 395
  12. Lina, 390
  13. Sophie, 380
  14. Johanna, 370
  15. Leonie, 364
  16. Nora, 332
  17. Luisa, 328
  18. Olivia, 325
  19. Lara, 315
  20. Elena, 305
  21. Ella, 297
  22. Amelie, 278
  23. Mila, 257
  24. Antonia, 256
  25. Helena, 253
  26. Magdalena, 251
  27. Valerie, 239
  28. Lia, 228
  29. Hanna, 225
  30. Miriam, 218
  31. Livia, 211
  32. Elisa, 210
  33. Isabella, 209
  34. Sara, 201
  35. Theresa, 200
  36. Alina, 197
  37. Julia, 196
  38. Elina, 187 (tie)
  39. Paulina, 187 (tie)
  40. Ida, 183 (tie)
  41. Leni, 183 (tie)
  42. Paula, 182 (tie)
  43. Sofia, 182 (tie)
  44. Sarah, 180
  45. Klara, 174
  46. Rosa, 173
  47. Flora, 171
  48. Aurelia, 170 (3-way tie)
  49. Emily, 170 (3-way tie)
  50. Katharina, 170 (3-way tie)

Boy names

  1. Elias, 671 baby boys
  2. Paul, 659
  3. Noah, 621
  4. Jakob, 620
  5. Maximilian, 599
  6. Felix, 584
  7. Leon, 561
  8. David, 500
  9. Jonas, 499
  10. Leo, 489
  11. Lukas, 453
  12. Tobias, 430
  13. Valentin, 424
  14. Moritz, 422
  15. Matteo, 394
  16. Theo, 366
  17. Anton, 363
  18. Fabian, 351
  19. Alexander, 349
  20. Julian, 338
  21. Liam, 332
  22. Simon, 329
  23. Samuel, 321
  24. Emil, 316
  25. Luca, 304
  26. Matthias, 282
  27. Luis, 280
  28. Raphael, 272
  29. Adam, 260
  30. Florian, 259
  31. Johannes, 252
  32. Gabriel, 248 (tie)
  33. Lorenz, 248 (tie)
  34. Emilio, 247
  35. Theodor, 233
  36. Finn, 231
  37. Oskar, 224
  38. Niklas, 222
  39. Leopold, 214
  40. Oliver, 212
  41. Benjamin, 202 (tie)
  42. Jonathan, 202 (tie)
  43. Sebastian, 196
  44. Ben, 192 (tie)
  45. Fabio, 192 (tie)
  46. Michael, 190
  47. Mateo, 185
  48. Kilian, 181
  49. Luka, 180
  50. Josef, 174

According to Statistics Austria, “12.5% of all newborn girls and 14.6% of all newborn boys were given one of the 10 most popular first names” in 2024.

At the other end of the spectrum are the thousands of names that were given to a single baby each last year. Here’s a selection:

Unique girl namesUnique boy names
Aorta, Beppa, Chisimdi, Desdina, Ekklesia, Febronia, Gustava, Hibat, Ikonija, Jolongi, Krinka, Lhanzey, Mrittika, Notburga, Ofri, Pinia, Rimpy, Songül, Tsvetelina, Uerda, Vanadis, Wranga, Yangtso, ZorjanaAerzu, Benneth, Cvijetin, Daphnis, Encho, Flavio, Gervin, Hanrui, Ireneus, Jandost, Kalsang, Linneo, Menippos, Nikolozi, Osimhen, Peyami, Reie, Shkelzen, Takuto, Utku, Veton, Wenz, Yetkin, Zhihmond

I don’t think I’ve ever seen Aorta — the word for the largest artery in the human body — used as a personal name before.

Notburga was the name of a medieval Austrian saint, and Osimhen may have been inspired by Nigerian soccer player Victor Osimhen.

Finally, here’s a link to Austria’s 2023 rankings, if you’d like to compare.

Sources: First names of newborns – Statistics Austria (in German), Emilia and Elias favourite baby names in 2024 – Statistics Austria (pdf), Atlas der Vornamen – Statistics Austria, Demographic characteristics of newborns – Statistics Austria

Image: Adapted from Flag of Austria (public domain)


Popular baby names in Denmark, 2024

Flag of Denmark
Flag of Denmark

Last year, the Scandinavian country of Denmark welcomed 57,079 babies.

What were the most popular names among these babies? Emma and Oscar.

Here are Denmark’s top 50 girl names and top 50 boy names of 2024:

Girl names

  1. Emma, 445 baby girls
  2. Ella, 437
  3. Luna, 423
  4. Alma, 415
  5. Frida, 408
  6. Olivia, 390
  7. Ida, 387
  8. Agnes, 382
  9. Karla, 379
  10. Nora, 373
  11. Sofia, 367
  12. Ellie, 351 (tie)
  13. Lily, 351 (tie)
  14. Freja, 348
  15. Clara, 302
  16. Asta, 296
  17. Anna, 294
  18. Alberte, 276
  19. Esther, 260
  20. Ellen, 256
  21. Aya, 231
  22. Astrid, 227
  23. Isabella, 220
  24. Josefine, 201
  25. Leonora, 199
  26. Hannah, 198 (tie)
  27. Lærke, 198 (tie)
  28. Vilma, 198
  29. Saga, 193
  30. Laura, 187
  31. Vera, 182
  32. Mathilde, 178
  33. Emily, 176
  34. Ingrid, 174
  35. Mille, 173
  36. Maja, 166 (tie)
  37. Marie, 166 (tie)
  38. Elina, 163 (tie)
  39. Liva, 163 (tie)
  40. Solvej, 161
  41. Liv, 156
  42. Eva, 153
  43. Merle, 147
  44. Victoria, 146
  45. Andrea, 145
  46. Molly, 140
  47. Kaja, 138 (3-way tie)
  48. Lea, 138 (3-way tie)
  49. Søs, 138 (3-way tie)
  50. Gry, 137

Boy names

  1. Oscar, 483 baby boys
  2. Carl, 466
  3. William, 457
  4. Noah, 440
  5. August, 437
  6. Aksel, 429
  7. Emil, 428
  8. Oliver, 423
  9. Alfred, 414
  10. Theo, 393
  11. Elliot, 378
  12. Malthe, 361
  13. Hugo, 356
  14. Arthur, 354
  15. Valdemar, 347
  16. Elias, 335
  17. Otto, 334
  18. Viggo, 328
  19. Lucas, 326
  20. Matheo, 290
  21. Lauge, 286
  22. Felix, 276
  23. Theodor, 258
  24. Liam, 256
  25. Conrad, 249
  26. Anker, 247
  27. Magnus, 246
  28. Holger, 244
  29. Erik, 242 (tie)
  30. Louie, 242 (tie)
  31. Luca, 238
  32. Anton, 235
  33. Victor, 234
  34. Ebbe, 227
  35. Vincent, 206
  36. Storm, 180
  37. Pelle, 179
  38. Nohr, 173 (tie)
  39. Walter, 173 (tie)
  40. Kalle, 171
  41. Albert, 166
  42. Atlas, 159
  43. Asger, 158 (tie)
  44. Frederik, 158 (tie)
  45. Vilhelm, 155
  46. Marius, 150
  47. Alexander, 146
  48. Johan, 144
  49. Bjørn, 139
  50. Adam, 138

Frida and Carl, the No. 1 names of 2023, are now in fifth and second place, respectively.

In the girls’ top 10, Nora replaced Sofia.

In the boys’ top 10, August and Theo replaced Malthe and Valdemar.

And the curious girl name Søs — short for Søster, the Danish word for “sister” — has been on the rise recently:

  • 2024: 138 baby girls named Søs in Denmark
  • 2023: 99 baby girls named Søs in Denmark
  • 2022: 79 baby girls named Søs in Denmark
  • 2021: 43 baby girls named Søs in Denmark
  • 2020: 20 baby girls named Søs in Denmark
  • 2019: 18 baby girls named Søs in Denmark

I can’t account for its trendiness, but I can tell you that the English equivalent, Sis, has never appeared in the U.S. data. (The name Sister has, though.)

Sources: Baby names – Statistics Denmark, Births – Statistics Denmark, Søs – Nordic Names

Image: Adapted from Flag of Denmark (public domain)

Popular baby names in Switzerland, 2024

Flag of Switzerland
Flag of Switzerland

Last year, the European country of Switzerland welcomed 78,256 babies.

What were the most popular names among these babies? Emma and Noah.

Here are Switzerland’s top 50 girl names and top 50 boy names of 2024:

Girl names

  1. Emma, 377 baby girls
  2. Mia, 367
  3. Sofia, 321
  4. Emilia, 271
  5. Lina, 255
  6. Elena, 253
  7. Mila, 252
  8. Olivia, 245
  9. Nora, 241
  10. Lia, 223
  11. Luna, 207
  12. Lea, 203
  13. Elina, 199
  14. Alina, 197
  15. Malea, 194
  16. Amelia, 189
  17. Nina, 186
  18. Sophia, 185
  19. Anna, 183
  20. Aurora, 181
  21. Chiara, 179 (tie)
  22. Leonie, 179 (tie)
  23. Ella, 178
  24. Yara, 170
  25. Lena, 167
  26. Lara, 165
  27. Eva, 162
  28. Alice, 160
  29. Giulia, 155
  30. Laura, 149
  31. Luana, 147
  32. Valentina, 146
  33. Maria, 144
  34. Elin, 142
  35. Julia, 141
  36. Malia, 137
  37. Alea, 136
  38. Juna, 135
  39. Aria, 133
  40. Ava, 132
  41. Livia, 130
  42. Dua, 129 (tie)
  43. Inaya, 129 (tie)
  44. Sara, 127
  45. Ayla, 119 (tie)
  46. Liana, 119 (tie)
  47. Alma, 118 (tie)
  48. Emily, 118 (tie)
  49. Sophie, 117 (tie)
  50. Victoria, 117 (tie)

Boy names

  1. Noah, 511 baby boys
  2. Liam, 395
  3. Matteo, 326
  4. Gabriel, 285
  5. Luca, 280
  6. Leo, 243
  7. Louis, 239
  8. Elio, 237
  9. Leon, 234
  10. Leano, 233
  11. Elias, 227
  12. Levi, 208
  13. Lio, 194
  14. Aaron, 191 (tie)
  15. Elia, 191 (tie)
  16. Theo, 187
  17. Leonardo, 185 (tie)
  18. Luan, 185 (tie)
  19. Nino, 181
  20. Noé, 180
  21. Malik, 176
  22. Enea, 174
  23. David, 168
  24. Livio, 167 (tie)
  25. Nico, 167 (tie)
  26. Finn, 163
  27. Samuel, 162
  28. Mateo, 161
  29. Adam, 158
  30. Lian, 157
  31. Arthur, 155
  32. Leandro, 147 (tie)
  33. Mattia, 147 (tie)
  34. Emilio, 145 (tie)
  35. Nael, 145 (tie)
  36. Mael, 144
  37. Henry, 142
  38. Emil, 141 (tie)
  39. Julian, 141 (tie)
  40. Diego, 140
  41. Kian, 139
  42. Ben, 137
  43. Laurin, 136
  44. Oliver, 132
  45. Levin, 129
  46. Lino, 128
  47. Dario, 124
  48. Robin, 120
  49. Jonas, 113 (tie)
  50. Nathan, 113 (tie)

Two of the fastest-rising names were Liora (for girls) and Clément (for boys).

Switzerland, which is home to over 9 million people, has four national languages: German, French, Italian, and Romansh. Here are the top names among the speakers of each of these languages:

Girl namesBoy names
German speakers
(62.3% of the population)		1. Mia, 275
2. Emilia, 241
3. Emma, 234		1. Noah, 365
2. Liam, 257
3. Matteo, 252
French speakers
(22.8% of pop.)		1. Emma, 124
2. Olivia, 103
3. Eva, 80		1. Gabriel, 130
2. Noah, 129
3. Liam, 117
Italian speakers
(8.0% of pop.)		1. Aurora, 27
2. Sofia, 22
3. Ginevra, 21		1. Leonardo, 31
2. Enea, 26 (tie)
3. Tommaso, 26 (tie)
Romansh speakers
(0.5% of pop.)		1. Alina, 41. David, 3 (tie)
2. Gino, 3 (tie)

And here’s a selection of the uncommon names that were given to just two babies each in Switzerland in 2024:

Rare girl names Rare boy names
Audélia, Berina, Cassia, Dasel, Etna, Fadrina, Galina, Hasti, Ioli, Joaquina, Kokob, Liridona, Maurane, Nilde, Ona, Pelda, Ruena, Sira, Thémis, Verica, Waimea, Xara, Yangtso, ZeenaAtari, Boaz, Célien, Deran, Enoa, Fanuel, Gaspar, Harald, Icaro, Jonte, Keylam, Lisi, Mayeul, Niculin, Onno, Pepe, Rodion, Shukri, Tsering, Urs, Vidar, Wilhelm, Yafiet, Zana

Possible explanations/associations for several of the above:

  • Etna is the name of Europe’s most active volcano, Mount Etna, which is located on the island of Sicily.
  • Fadrina is the feminine form of Fadri, a Romansh name related to Frederick.
  • Liridona is based on the Albanian word liri, meaning “freedom, liberty.”
  • Niculin is a Romansh name related to Nicholas.
  • Waimea is a Hawaiian place-name meaning “reddish water.” (I remember seeing a single baby named Waimea in the 2021 Sonoma rankings, but I didn’t expect to find two babies named Waimea in Switzerland!)

Other Romansh names I noticed in the rankings were the girl name Bigna (given to 12 babies) and the boy names Corsin (10) and Curdin (5).

Finally, here are Switzerland’s 2023 rankings, if you’d like to compare last year to the year before.

Sources: First names of newborns – Federal Statistical Office, Births and deaths – Federal Statistical Office, Languages of Switzerland – Wikipedia, Behind the Name, Wehewehe Wikiwiki Hawaiian Language Dictionaries

Image: Adapted from Flag of Switzerland (public domain)

Popular baby names in Liechtenstein, 2024

Flag of Liechtenstein
Flag of Liechtenstein

Last year, the tiny European country of Liechtenstein welcomed 341 babies — 166 girls and 175 boys.

What were the most popular names among these babies? Sophia for girls and Leon and Noah/Noa (tie) for boys.

Here are Liechtenstein’s top girl names and top boy names of 2024:

Girl names

  1. Sophia, 5 baby girls
  2. Leyla and Livia, 4 each (tie)
  3. Alina, Chiara, Leonie, Lia, and Paula, 3 each (5-way tie)
  4. Ajla/Ayla, Amelie, Elisa, Emilia, Fiona, Freya, Hanna/Hannah, Ida, Ilenia, Laura, Lina, Lou, Luisa, Maya, Melina, Nelia, Noelia, Nora, Olivia, Romina, Timea, and Valea, 2 each (22-way tie)

Boy names

  1. Leon and Noah/Noa, 5 baby boys each (tie)
  2. Elias, Julian, Laurin, Leano, Levi, Linus, Lio, Lionel, Luca, Matteo/Matheo, Theo, and Valentin, 3 each (12-way tie)
  3. Alexander, Ben, Elia, Emil, Gino, Jonas, Kian, Lenny, Leyan, Lorenzo, Marlo, Nelio, Noe, Noel, and Vincent, 2 each (15-way tie)

The rest of the names were bestowed just once:

Unique girl names (94)Unique boy names (99)
Adriana, Alba, Alessia, Amara, Amaya, Amberly, Amelia, Amina, Amra, Anna, Asel, Asena, Aurelia, Aylin, Belinda, Carla, Celia, Charlotte, Chloé, Delia, Eflin, Elena, Elenor, Elina, Elisabeth, Ella, Elsa, Emily, Emma, Flavia, Frieda, Gabriella, Giada, Hale, Ivie, Jana, Julia, Juna, Kalea, Kate, Katharina, Klara, Kori, Lania, Larissa, Lea, Letizia, Lillian, Linn, Liuna, Liv, Lola, Lorine, Lua, Luna, Malea, Malia, Mara, Maria, Marie, Martina, Mayla, Melissa, Mia, Michaela, Mila, Milena, Morena, Naira, Nayla, Neea, Nilya, Noemi, Nuray, Peyang, Rital, Rosa, Ruby, Run, Samara, Sienna, Sophie, Sumaya, Sunniva, Thalia, Valentina, Valeria, Valérie, Viktoria, Viola, Vivienne, Yara, Yasmin, YunaAdni, Afonso, Albert, Amelio, Andrin, Anis, Anton, Aran, Aras, Arel, Aren, Arian, Arno, Arthur, Aurelio, Benjamin, Bernardo, Bryan, Charles, Ciro, Colin, Constantin, Daadir, Dani, Danial, David, Demir, Dijar, Ege, Eli, Elouan, Enzo, Erik, Erin, Fabian, Finn, Florian, Gabriel, Hayden, Henrik, Ilario, Ilyas, Jack, Jakob, Jayden, Johann, Jonathan, Jordan, Kenny, Konstantin, Leo, Leonardo, Leonidas, Leron, Levin, Levio, Liam, Lineo, Lino, Lou, Luan, Luciano, Mads, Magnus, Mailo, Maksim, Marco, Matej, Mats, Mattia, Matvii, Max, Maximilian, Miko, Naél, Near, Nevio, Nico, Nicolas, Paolo, Paul, Poyraz, Qingyang, Quentin, Raphael, Rayan, Rodrigo, Rui, Salvador, Samuel, Simon, Tino, Tobias, Valerio, Yaro, Yaroslav, Yuri, Yusuf, Zeyd

I didn’t post about Liechtenstein’s top baby names of 2023 or 2022, but here are Liechtenstein’s 2021 rankings.

Source: Neugeborenennamen – Liechtensteinische Landesverwaltung Statistikportal

Image: Adapted from Flag of Liechtenstein (public domain)