How popular is the baby name Theo in the United States right now? How popular was it historically? Find out using the graph below! Plus, check out 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

Top first letters of baby names in the United States, 2021

Which first letters were the most and least popular for U.S. baby names in 2021?

Top first letters for girl names: A, E, M

For baby girls, the most-used first letter was A, followed by E and M. The least-used first letter was U.

Graph of first letter popularity for U.S. baby girl names, 2021

The most popular girl names per letter were…

  • A-names (over 273,100 baby girls): Amelia, Ava, Abigail, Avery, Aria, Aurora
  • B-names (over 49,300): Brooklyn, Bella, Brielle, Blakely, Bailey, Brianna
  • C-names (over 93,100): Charlotte, Camila, Chloe, Claire, Caroline, Cora
  • D-names (over 40,300): Delilah, Daisy, Diana, Daniela, Delaney, Dakota
  • E-names (over 155,300): Emma, Evelyn, Elizabeth, Eleanor, Ella, Emily
  • F-names (over 16,500): Freya, Faith, Finley, Fiona, Fatima, Frances
  • G-names (over 42,900): Gianna, Grace, Genesis, Gabriella, Genevieve, Georgia
  • H-names (over 54,900): Harper, Hazel, Hannah, Hailey, Hadley, Harmony
  • I-names (over 44,100): Isabella, Isla, Ivy, Iris, Isabelle, Isabel
  • J-names (over 73,500): Josephine, Jade, Julia, Josie, Juniper, Jasmine
  • K-names (over 89,100): Kinsley, Kennedy, Kaylee, Kehlani, Katherine, Kylie
  • L-names (over 115,300): Luna, Layla, Lily, Leah, Lucy, Lillian
  • M-names (over 143,500): Mia, Mila, Madison, Maya, Madelyn, Madeline
  • N-names (over 58,800): Nora, Nova, Naomi, Natalie, Natalia, Nevaeh
  • O-names (over 30,200): Olivia, Olive, Oakley, Oaklynn, Octavia, Ophelia
  • P-names (over 37,600): Penelope, Paisley, Piper, Peyton, Parker, Presley
  • Q-names (over 4,100): Quinn, Quincy, Queen, Quinley, Quetzalli, Quinnley
  • R-names (over 74,800): Riley, Ruby, Rylee, Raelynn, Rose, Remi
  • S-names (over 116,400): Sophia, Sofia, Scarlett, Stella, Savannah, Skylar
  • T-names (over 24,200): Taylor, Teagan, Trinity, Tatum, Tessa, Talia
  • U-names (over 600): Unique, Uma, Ulani, Una, Unknown, Unity
  • V-names (over 32,400): Violet, Victoria, Valentina, Vivian, Valerie, Valeria
  • W-names (over 14,700): Willow, Wren, Winter, Wynter, Willa, Wrenley
  • X-names (over 4,500): Ximena, Xiomara, Xyla, Xena, Xochitl, Xitlali
  • Y-names (over 7,600): Yaretzi, Yara, Yareli, Yasmin, Yamileth, Yuna
  • Z-names (over 29,100): Zoey, Zoe, Zuri, Zara, Zariah, Zelda

Top first letters for boy names: J, A, L

For baby boys, the most-used first letter was J, followed by A and L. The least-used first letter was U.

Graph of first letter popularity for U.S. baby boy names, 2021

The most popular boy names per letter were…

  • A-names (over 178,600 baby boys): Alexander, Asher, Aiden, Anthony, Andrew, Adrian
  • B-names (over 86,600): Benjamin, Brooks, Bennett, Beau, Bryson, Brayden
  • C-names (over 123,000): Carter, Charles, Caleb, Christopher, Cameron, Cooper
  • D-names (over 85,000): Daniel, David, Dylan, Dominic, Declan, Damian
  • E-names (over 108,700): Elijah, Ethan, Ezra, Elias, Ezekiel, Eli
  • F-names (over 20,500): Finn, Felix, Finley, Francisco, Fernando, Finnegan
  • G-names (over 53,500): Grayson, Gabriel, Greyson, Gael, Giovanni, George
  • H-names (over 50,000): Henry, Hudson, Hunter, Harrison, Hayden, Hayes
  • I-names (over 31,500): Isaac, Isaiah, Ian, Ivan, Israel, Ismael
  • J-names (over 202,800): James, Jack, Jackson, Jacob, John, Joseph
  • K-names (over 93,400): Kai, Kayden, Kingston, Kaiden, Kevin, King
  • L-names (over 133,400): Liam, Lucas, Levi, Logan, Leo, Luke
  • M-names (over 126,700): Mateo, Michael, Mason, Matthew, Maverick, Miles
  • N-names (over 57,400): Noah, Nathan, Nolan, Nicholas, Nathaniel, Nicolas
  • O-names (over 38,800): Oliver, Owen, Oscar, Omar, Orion, Odin
  • P-names (over 23,700): Parker, Patrick, Peter, Preston, Phoenix, Paxton
  • Q-names (over 3,100): Quinn, Quentin, Quincy, Quinton, Quintin, Quinten
  • R-names (over 82,800): Ryan, Roman, Robert, Rowan, River, Ryder
  • S-names (over 70,300): Sebastian, Samuel, Santiago, Silas, Sawyer, Steven
  • T-names (over 59,200): Theodore, Thomas, Thiago, Theo, Tyler, Tucker
  • U-names (over 2,500): Uriel, Uriah, Ulises, Ulysses, Uziel, Umar
  • V-names (over 11,000): Vincent, Victor, Valentino, Vincenzo, Vicente, Vihaan
  • W-names (over 49,100): William, Wyatt, Waylon, Wesley, Weston, Walker
  • X-names (over 7,200): Xavier, Xander, Xzavier, Xavion, Xavien, Xavian
  • Y-names (over 8,200): Yusuf, Yosef, Yehuda, Yousef, Yahir, Yisroel
  • Z-names (over 26,900): Zion, Zachary, Zayden, Zane, Zayn, Zander

Rising boy names in the United States, 2021

Which boy names increased in usage the most from 2020 to 2021?

Here’s a table of the fastest-rising boy names of 2021. On the left are the top 25 increases in terms of absolute numbers of babies, and on the right are the top 25 increases in terms of relative numbers of babies.

RankBoy nameAbsolute riseBoy nameRelative rise
1Luca2,031Calian914%
2Waylon1,049Treu440%
3Walker989Aliyar320%
4Theodore916Nain320%
5Luka863Zealand282%
6Kai755Lorik280%
7Hudson750Nahel280%
8Ezekiel741Nuchem280%
9August710Arlis267%
10River652Kiko267%
11Asher613Dayvon264%
12Jack588Shloma257%
13Brooks564Erling240%
14Ezra562Rev240%
15Leo547Skylen240%
16Henry542Worth240%
17Ace522Kove237%
18Wesley501Kj233%
19Enzo501Alvey229%
20Liam495Ioane222%
21Atlas474Alban220%
22Theo467Jontae220%
23Beau460Onyxx220%
24Maverick434Slayter220%
25Levi411Vyan220%

Luca (and Luka) may have been given a boost by the 2021 Pixar film Luca. And it looks like Calian is a character on a TV series called Don’t Look Deeper.

If you can explain any of the other rises, please leave a comment!

Popular baby names on the Isle of Man, 2021

Isle of Man

According to the Civil Registry of the Isle of Man, the most popular baby names on the island last year were Elsie and Arthur.

Here are the Isle of Man’s top 5+ girl names and top 5+ boy names of 2021:

Girl Names

  1. Elsie, 7 baby girls
  2. Evie/Evee, 6
  3. Alice, 5 (6-way tie)
  4. Ella, 5 (6-way tie)
  5. Grace/Gracie, 5 (6-way tie)
  6. Millie, 5 (6-way tie)
  7. Olivia, 5 (6-way tie)
  8. Poppy, 5 (6-way tie)

Boy Names

  1. Arthur, 10 baby boys
  2. Theo/Theodore, 8
  3. Charlie/Charles, 6
  4. Arlo, 5 (3-way tie)
  5. Freddie, 5 (3-way tie)
  6. Oliver, 5 (3-way tie)

In 2020, the top names were Ella and Leo/Oliver (tie).

news: Most popular baby names in 2021 revealed as Arthur and Elsie

Popular Baby Names in Liechtenstein, 2020

liechtenstein

The tiny country of Liechtenstein — located in the Alps, between Austria and Switzerland — welcomed 188 baby girls and 165 baby boys in 2020. According to Liechtenstein’s Office for Statistics (Amt für Statistik), the most popular baby names in the German-speaking microstate were Sofia and Maximilian/Oscar (tie).

Here are Liechtenstein’s top girl names and top boy names of 2020:

Girl Names

  1. Sofia/Sophia, 7 baby girls
  2. Laura, 5
  3. Hanna/Hannah, 4
  4. Amélie/Amelie, Anna, Annika, Emma, Julia, Lina, Mia, Nina, Noemi, Nora, Sophie, and Valentina, 3 each [12-way tie]
  5. Alya, Amelia, Elena, Elisa/Eliza, Ella, Emilia, Estelle, Klara, Lara, Leonie, Letizia, Luisa, Malia/Maliyah, Mara, Melissa, Mina, Naomi, Noelia, and Paula, 2 each [19-way tie]

Boy Names

  1. Maximilian and Oscar/Oskar, 4 baby boys each [tie]
  2. Laurin, Leo, Lian/Lyan, Luis/Louis, Noah/Noa, and Theo, 3 each [6-way tie]
  3. Gustav, Henri, Ivan/Iwan, Lenny, Leon, Leopold, Matteo, Max, Muhamed/Muhammed, Nico, Nino, Noel, and Thiago/Tiago, 2 each [13-way tie]

(Lian, one of the 2nd-place boy names, is a German short form of Julian or Kilian.)

Liechtenstein also released the single-use baby names of 2020, which is very cool. All the names not accounted for above are in the table below:

Unique girl names (98)Unique boy names (113)
Adea, Adriana, Ahlam, Aitana, Alejna, Alenia, Alina, Ally, Alya-Su, Amina, Amy, Anastasia, Anely, Annalena, Anna-Rosa, Anouk, Aria, Ariana, Aslihan, Aurora, Bissan, Carolina, Cecilia, Chiara, Clea, Cora, Darija, Elenia, Elina, Elizabeta, Elizan, Elna, Eltea, Emanuela, Esîlya, Fabia, Farah, Fatima, Fjella, Georgie-Gisele, Gioia, Giulia, Helena, Ida, Ilenia, Iris, Irma, Ivy, Jamie, Joleen, Joya, Juna, Kaia, Katharina, Keysi, Ksenija, Lena, Leonor, Lilian, Liyana, Loredana, Lorena, Luana, Luena, Maeva, Malak, Maria, Maria-Luisa, Marie, Melina, Merle, Mia-Sophie, Miira, Mila, Mira, Naila, Natalia, Nayeli, Nelia, Nika, Riva, Rivanna, Romy, Ronja, Salima, Samira, Sandrina, Senada, Soley, Tajra, Teresa, Tina, Valérie, Viviana, Xoawa, Yara, Yesim, ZeynepAaron, Adrián, Aidan, Ajan, Alessandro, Alonso, Alp, Anas, Aril, Armon, Arthur, Aurel, Aurelio, Benedikt, Benjamin, Benno, Bruno, Christian, Christoph, Clark, Curdin, Cyano, Damiano, Danilo, Dante, Davide, Dominik, Eduardo, Elija, Elvis, Emanuel, Emil, Emilian, Emilio, Enes, Erian, Erion, Fabian, Federico, Finn, Gabriele, Giuliano, Hamza, Hazar, Hendrick, Jamie, Jan, Jari, Jeremias, Jérôme, Johannes, Jonah, Jonas, Jorel, Julian, Kentse, Kiano, Konstantin, Lauri, Leart, Levin, Liam, Liandro, Linus, Lio, Lionel, Lorent, Luan, Macgyver, Mahir, Majiid, Marco, Marius, Martim, Massimo, Mats, Maurice, Michael, Michele, Mike, Mikyas, Milan, Nael, Nando, Nawin, Neo, Nick, Nicolas, Niklas, Oliver, Omer, Paul, Philomeno, Pierangelo, Raffi, Ragnar, Redford, Rico, Ruben, Samuel, Sebastian, Tenzin, Tino, Tobias, Umut, Valentino, Valerio, Victor, Vito, Yakup, Yanis, Yuusuf, Zeno

Finally, since this is the first time I’m posting rankings for Liechtenstein, let’s throw in the country’s top baby names for the two previous years:

  • In 2019: Emma (9) and a four-way tie between Fabio, Leon, Matteo and Paul (4 each).
  • In 2018: Valentina (7) and a three-way tie between Ben, Leon, and Samuel (4 each).

Sources: Vornamenstatistik – Amt für Statistik (AS), Liechtenstein – Wikipedia, Behind the Name

Popular Baby Names in Ireland, 2021

ireland

According to data from Ireland’s Central Statistics Office (CSO), the most popular baby names in the country last year were Fiadh and Jack.

Here are Ireland’s top 10 girl names and top 10 boy names of 2021:

Girl Names

  1. Fiadh, 424 baby girls
  2. Grace, 412
  3. Emily, 388
  4. Sophie, 336
  5. Éabha, 288
  6. Lucy, 287
  7. Mia, 279
  8. Ava, 272
  9. Lily, 271
  10. Ella, 268

Boy Names

  1. Jack, 667 baby boys
  2. Noah, 475
  3. James, 442
  4. Conor, 360
  5. Rían, 357
  6. Liam, 353
  7. Charlie, 345
  8. Daniel, 325
  9. Cillian, 322
  10. Tadhg, 318

In the girls’ top 10, Éabha and Lily replaced Amelia and Hannah. (In both 2019 and 2020, Éabha was the fastest-rising girl name in Ireland.)

In the boys’ top 10, Rían, Cillian, and Tadhg replaced Finn, Fionn, and Harry.

Newbies to the girls’ top 100 were Indie, Ayla and Lottie; newbies to the boys’ top 100 were Teddy, Daithí, Páidí, Jaxon, Brody, Ted, Hunter, Tadgh, Tiernan, and Arlo.

The fastest-rising names in the top 100 in terms of numbers of babies were:

  • Croía (+60 baby girls), Emily (+59), Fiadh (+58), Éabha (+54), Isla (+52)
  • Rían (+72 baby boys), Jack (+70), Danny (+57), Theo (+53), Ollie (+51)

The fastest-rising names in terms of rank were:

  • Croía (+43 spots), Indie (+28), Ayla (+28), Fíadh (+24), Daisy (+21)
  • Ted (+49 spots), Hunter (+38), Hugo (+35), Brody (+35), Teddy (+31)

Rían (which was already on the rise) and Croía have both given a boost recently by Irish MMA fighter Conor McGregor, who welcomed a daughter named Croía Mairéad at the start of 2019 and a son named Rían in May of 2021.

Here’s what writer and Irish language activist Darach Ó Séaghdha’s had to say about the rise of Rían (and Éabha):

Given that the first name Ryan started to decline in popularity in the 2010s around the time Rian and Rían began to ascend it is reasonable to see Rían as an update or replacement to Ryan, much as Éabha has climbed in popularity as Eve, Ava and Aoibhe have wavered.

He also noted that “Rían and Rian would be the [most popular] Gaeilge-origin boy name if counted together, edging ahead of Conor.”

Sources: Irish Babies’ Names, Irish Babies’ Names 2021, The Irish For: The rise of Rían – the latest baby names in Ireland

P.S. To follow up on Friday’s post about the free lighthouse tour…the name Patrick is currently ranked 19th in Ireland, but none of the other three names (Paddy, Pat, or Patricia) rank anywhere near the top 100. That said, one of the names new to the boys’ top 100 last year was Páidí (pronounced paw-dee) — a pet form of Pádraig, which is an Irish form of Patrick.