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.

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Popularity of the baby name Theo


Posts that mention the name Theo

Popular baby names in Ireland, 2024

Flag of Ireland
Flag of Ireland

The top baby names in the Republic of Ireland last year were Sophie and Jack.

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

Girl names

  1. Sophie, 294 baby girls
  2. Éabha, 293
  3. Grace, 291
  4. Emily, 290
  5. Fiadh, 286
  6. Lily, 253
  7. Olivia, 246
  8. Amelia, 220
  9. Sadie, 216
  10. Mia, 213
  11. Lucy, 204
  12. Freya, 196
  13. Isla, 193
  14. Ella, 192
  15. Ellie, 190
  16. Croía, 188
  17. Emma, 187 (tie)
  18. Maya, 187 (tie)
  19. Sophia, 180
  20. Chloe, 179 (tie)
  21. Hannah, 179 (tie)
  22. Molly, 171
  23. Evie, 167
  24. Saoirse, 164
  25. Sofia, 154
  26. Ava, 152
  27. Robyn, 148
  28. Millie, 145
  29. Anna, 140
  30. Ruby, 134
  31. Caoimhe, 131 (tie)
  32. Rosie, 131 (tie)
  33. Róisín, 126
  34. Bonnie, 123
  35. Erin, 120 (tie)
  36. Isabelle, 120 (tie)
  37. Cara, 118
  38. Sadhbh, 117
  39. Holly, 115
  40. Éala, 114
  41. Annie, 112
  42. Clodagh, 109 (tie)
  43. Daisy, 109 (tie)
  44. Hazel, 108
  45. Aoife, 107 (tie)
  46. Katie, 107 (tie)
  47. Kate, 106 (tie)
  48. Willow, 106 (tie)
  49. Maisie, 105
  50. Ada, 104 (tie)
  51. Méabh, 104 (tie)

Boy names

  1. Jack, 490 baby boys
  2. Noah, 486
  3. Rían, 432
  4. Cillian, 352
  5. James, 336
  6. Tadhg, 318
  7. Fionn, 304
  8. Liam, 303
  9. Oisín, 286
  10. Charlie, 258
  11. Daniel, 257
  12. Finn, 255
  13. Theo, 252
  14. Thomas, 226
  15. Seán, 222
  16. Patrick, 220
  17. Michael, 218
  18. Luke, 217
  19. Conor, 210
  20. Harry, 209
  21. Tommy, 202
  22. Leo, 201 (tie)
  23. Páidí, 201 (tie)
  24. Luca, 197
  25. Adam, 188
  26. Darragh, 184
  27. Oliver, 181
  28. Bobby, 179
  29. John, 168
  30. Jamie, 162 (tie)
  31. Kai, 162 (tie)
  32. Oscar, 159
  33. Cian, 158 (tie)
  34. Max, 158 (tie)
  35. Ollie, 157
  36. Alex, 155
  37. Callum, 154
  38. Sonny, 147
  39. Dylan, 141
  40. David, 134
  41. Ben, 132
  42. Matthew, 131
  43. Caelan, 128
  44. Alexander, 127
  45. Muhammad, 126
  46. Ryan, 124
  47. Arthur, 119
  48. Arlo, 118
  49. Alfie, 117
  50. Shay, 107

The trendy name Croía (pronounced KREE-a) rose from 95th in 2020, to 52nd in 2021, to 38th in 2022, to 24th in 2023, to 16th last year. Do you think it will reach the top 10 in 2025?

Speaking of names on the upswing, the fastest-rising girl names in the top 100 were Maya (in terms of number of babies) and Rhea (in terms of rank). Likewise, the fastest-rising boy names in the top 100 were Rían (in terms of number of babies) and Caleb (in terms of rank).

And what about the names at the other end of the spectrum? Here’s a selection of the names given to just 3 babies each in Ireland last year:

Rare girl namesRare boy names
Annalivia, Brídín, Ceoladh, Dolcie, Elira, Fearne, Goldie, Heather, Iveagh, Jessa, Kenza, Líobhan, Morrigan, Nollaig, Oonagh, Peach, Réalta, Saffi, Tiffany, Vega, Willa, ZariaAhan, Bento, Chulainn, Daróg, Enda, Fearghal, Gene, Hughie, Íarlaith, Jameson, Keelin, Laith, Mick, Naomhán, Oilibhéar, Pat, Ralphie, Séadh, Téidí, Vlad, Willie, Zeke

The Irish word réalta means “star.”

Source: Irish Babies’ Names – CSO (Irish Babies’ Names 2024)

Image: Adapted from Flag of Ireland (public domain)

Popular baby names in Karlsruhe and Pforzheim, 2024

Flag of Germany
Flag of Germany

The German cities of Karlsruhe and Pforzheim are located about 20 miles away from one another in the southwestern state of Baden-Württemberg.

What were the most popular baby names in each city last year?

Let’s look at the larger one first…

Karlsruhe

The city of Karlsruhe — whose name means “Karl’s repose” in German — welcomed approximately 4,600 babies last year. (Notably, more than half of these babies were born to parents who lived outside the city.)

Here are Karlsruhe’s top 10+ girl names and top 10+ boy names of 2024:

Girl names

  1. Emma, 34 baby girls
  2. Mila, 33
  3. Lina, 26
  4. Ida, 23
  5. Ella, 22
  6. Malia, 21 (tie)
  7. Marie, 21 (tie)
  8. Leni, 18 (tie)
  9. Mia, 18 (tie)
  10. Anna, 17 (4-way tie)
  11. Lia, 17 (4-way tie)
  12. Lotte, 17 (4-way tie)
  13. Nora, 17 (4-way tie)
  14. Amelie, 16 (3-way tie)
  15. Lara, 16 (3-way tie)
  16. Mara, 16 (3-way tie)
  17. Sophie, 15

Boy names

  1. Levi, 29 baby boys (tie)
  2. Noah, 29 (tie)
  3. Elias, 28 (tie)
  4. Emil, 28 (tie)
  5. Paul, 27
  6. Liam, 25 (tie)
  7. Samuel, 25 (tie)
  8. Leon, 24 (tie)
  9. Milan, 24 (tie)
  10. Luca, 23
  11. Anton, 22 (tie)
  12. Ben, 22 (tie)
  13. Jakob, 21
  14. David, 20 (5-way tie)
  15. Finn, 20 (5-way tie)
  16. Jonathan, 20 (5-way tie)
  17. Leo, 20 (5-way tie)
  18. Theo, 20 (5-way tie)
  19. Emilio, 19

Pforzheim

The city of Pforzheim welcomed more than 2,700 babies last year. (As of December 19, the total count was 2,731.)

Here are Pforzheim’s projected top 3 girl names and top 3 boy names of 2024:

Girl names

  1. Lina, 20 baby girls
  2. Sophia, 16
    • The spelling “Sofia” was given to another 9 baby girls.
  3. Emilia, 14

Boy names

  1. Leon, 23 baby boys (tie)
  2. Liam, 23 (tie)
  3. Elias, 18

I’ve never posted rankings for either Karlsruhe or Pforzheim before, but here are the most recent (albeit unofficial) rankings for Germany itself.

Sources:

Image: Adapted from Flag of Germany (public domain)

Popular baby names in England and Wales (UK), 2023

Flag of the United Kingdom
Flag of the United Kingdom

Last year, the countries of England and Wales together welcomed 591,072 babies.

What were the most popular names among these babies? Olivia and Muhammad.

Here are England and Wales’ top 50 girl names and top 50 boy names of 2023:

Girl names

  1. Olivia, 2,906 baby girls
  2. Amelia, 2,663
  3. Isla, 2,337
  4. Lily, 2,290
  5. Freya, 2,086
  6. Ava, 2,050
  7. Ivy, 1,997
  8. Florence, 1,899
  9. Willow, 1,833
  10. Isabella, 1,795
  11. Poppy, 1,755
    • Poppy ranked third among baby girls born in November specifically, no doubt because of the association between poppies and Remembrance Day (Nov. 11).
  12. Sophia, 1,679
  13. Evelyn, 1,673
  14. Elsie, 1,662
  15. Sienna, 1,657
  16. Mia, 1,640
  17. Daisy, 1,585
  18. Grace, 1,541
  19. Sofia, 1,514
  20. Phoebe, 1,510
  21. Rosie, 1,508
  22. Harper, 1,466
  23. Charlotte, 1,373
  24. Evie, 1,350
  25. Millie, 1,349
  26. Bonnie, 1,346
  27. Ella, 1,307
  28. Emily, 1,280
  29. Maya, 1,255
  30. Matilda, 1,212
  31. Aria, 1,198
  32. Delilah, 1,194
  33. Penelope, 1,156
  34. Hallie, 1,154
  35. Mila, 1,127
  36. Maeve, 1,114
  37. Ada, 1,089
  38. Luna, 1,063
  39. Ruby, 1,059
  40. Mabel, 1,051
  41. Maisie, 1,039
  42. Violet, 1,034
  43. Arabella, 1,029
  44. Margot, 1,025
  45. Emilia, 1,017
  46. Isabelle, 984
  47. Esme, 982
  48. Lottie, 980
  49. Aurora, 964
  50. Alice, 955

Boy names

  1. Muhammad, 4,661 baby boys
  2. Noah, 4,382
  3. Oliver, 3,556
  4. George, 3,494
  5. Leo, 3,416
  6. Arthur, 3,387
  7. Luca, 3,195
  8. Theodore, 2,666
  9. Oscar, 2,632
  10. Henry, 2,490
  11. Theo, 2,489
  12. Freddie, 2,481
  13. Archie, 2,400
  14. Arlo, 2,253
  15. Jude, 2,177
  16. Alfie, 2,111
  17. Charlie, 2,010
  18. Jack, 1,953
  19. Thomas, 1,855
  20. Finley, 1,844
  21. Harry, 1,799
  22. Albie, 1,756
  23. Teddy, 1,687
  24. Jacob, 1,655
  25. Lucas, 1,644
  26. Tommy, 1,629
  27. Isaac, 1,611
  28. Mohammed, 1,601
  29. William, 1,544
  30. Edward, 1,501
  31. Elijah, 1,482
  32. Roman, 1,481
  33. Rory, 1,468
  34. Alexander, 1,456
  35. James, 1,430
  36. Louie, 1,421
  37. Reuben, 1,356
  38. Ezra, 1,345
  39. Oakley, 1,343
  40. Joshua, 1,339
  41. Adam, 1,326
  42. Sebastian, 1,313
  43. Hudson, 1,291
  44. Max, 1,274
  45. Louis, 1,236
  46. Ronnie, 1,222
  47. Ethan, 1,198
  48. Hugo, 1,174
  49. Harrison, 1,151
  50. Mason, 1,118

In the girls’ top 10, Willow replaced Mia.

In the boys’ top 10, Luca and Henry replaced Theo and Freddie.

New to the girls’ top 100 were Hazel, Lilah, Autumn, Nevaeh, and Raya.

New to the boys’ top 100 were Jax, Enzo, and Bodhi.

The number of hyphenated girl names increased significantly (from 12,332 to 19,143), while the number of hyphenated boy names decreased slightly (from 3,140 to 2,807).

And here’s a selection of uncommon names that were given to just three babies each in England and Wales (combined) in 2023:

Rare girl namesRare boy names
Alfia, Bluebella, Buddug, Coni, Dolcy, Ephelia, Fen, Glesni, Harasees, Indica, Jodh, Khulood, Larnie, Myrto, Nectaria, Omuwa, Pip, Qiraat, Reevie, Sorrel, Tegwen, Udaina, Vani, Waverly, Xanthea, Yvaine, ZoellaApollon, Banksy, Blaidd, Catalin, Dishan, Eifion, Fayzan, Gurvir, Haaland, Iverson, Jibriel, Kirtan, Lucho, Monaco, Nalan, Orwell, Prevail, Qusay, Ranbir, Sebbie, Tassilo, Ulrich, Vedh, Wildan, Xavian, Yamac, Zuko

Possible explanations/associations for several of the above:

  • Blaidd means “wolf” in Welsh. (It’s also the name of a half-wolf character in the 2022 video game Elden Ring.)
  • Buddug is based on the Welsh word budd, which means “benefit, profit.” It’s the Welsh equivalent of Boudicca (the name of the ancient British queen who led a revolt against the Romans).
  • Fen might refer to the type of wetland.
  • Glesni means “blueness” or “greenness” in Welsh.
  • Haaland is the surname of Norwegian soccer player Erling Haaland (who currently plays for Manchester City F.C.).

Here are the 2023 rankings for Scotland and Northern Ireland — the other two countries in the United Kingdom — and the 2022 rankings for England and Wales, if you’d like to compare last year to the year before.

Sources:

Image: Adapted from Flag of the United Kingdom (public domain)

Top baby names in Germany, 2023

Flag of Germany
Flag of Germany

Last year, the Central European country of Germany welcomed 692,989 babies.

What were the most popular names among these babies?

We don’t know for sure, because Germany doesn’t release official baby name rankings. But two unofficial sets of rankings — one from the Society for the German Language (GfdS), the other from name researcher Knud Bielefeld — agree that Germany’s top boy name of 2023 was Noah.

(The rankings by the GfdS account for over 90% of the first names bestowed in Germany in 2023, while the rankings by Bielefeld account for about 40% of the babies born in Germany in 2023. Both sets of rankings combine different spellings of the same name.)

Here are Germany’s top girl names, according to both sources:

Girl names (GfdS)Girl names (Bielefeld)
1Sophia/SofiaEmilia
2EmiliaEmma
3EmmaSophia
4MiaHannah
5Hannah/HannaMia
6MilaElla
7LinaMila
8EllaLina
9Klara/ClaraLia
10Lia/LiahLeni

And here are Germany’s top boy names, according to both sources:

Boy names (GfdS)Boy names (Bielefeld)
1NoahNoah
2Matteo/Mattheo/Mateo/MatheoMatteo
3LeonElias
4PaulLeon
5EmilPaul
6Luca/LukaTheo
7Henry/HenriLuca
8EliasFinn
9Louis/LuisLiam
10LiamEmil

Finally, here are Germany’s top names of 2022, if you’d like to compare last year to the year before.

Sources:

Image: Adapted from Flag of Germany (public domain)