How popular is the baby name Billy 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 Billy.

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Popularity of the baby name Billy


Posts that mention the name Billy

How many twins get matchy-matchy names?

In a comment on last week’s twin names post, Erin said she’d “love to see some kind of analysis on what percentage of twins are given names that are/aren’t matchy-matchy.”

I do know of one analysis like this. It’s 50 years old, so it’s not exactly up-to-date, but these were the findings:

  • 79% of twins overall had similar names
    • 90% of identical twins had similar names
    • 75% of fraternal twins had similar names

Name researcher Robert Plank published “Names of Twins” in the journal Names way back in 1964. This study was mentioned by H. Edward Deluzain in the essay “Names and Personal Identity” in 1996:

Robert Plank, who studied names of twins, discovered that the names fit into three patterns and that the names in two of the patterns show unmistakable similarity. The most common pattern, which occurred in 62% of the cases Plank studied, was the use of names that begin with the same letter. This included such names as Richard and Robert (Ricky and Robby), Joseph and Judith (Joey and Judy), Louise and Louisa, as well as such names as Paul and Paula and Patrick and Patricia. The second pattern involved names that had different first letters but where similar in sound, rhythm, or rhyme. Such sets of names as Tracy and Stacy, Billy Joe and Penny Sue accounted for 17% of the sets of names. Finally, Plank found that only 21% of the sets of names were different enough from one another to be considered dissimilar. Identical twins, who are always of the same sex and who look so much alike people have trouble telling them apart, fare worse than fraternal twins in the similarity of their names. For, as Plank found, almost 90% of the identical twins had similar names compared to roughly only 75% of the fraternals.

Have any of you seen more recent research on similar/dissimilar names for twins?

Popular baby names in Ireland, 2012

Flag of Ireland
Flag of Ireland


The most popular baby names in Ireland came out a few days ago.

According to the Central Statistics Office, the country’s top names are Emily for girls and Jack for boys.

Here are the top 100 girl names and top 100 boy names of 2012:

Girl Names

  1. Emily
  2. Sophie
  3. Emma
  4. Grace
  5. Lily
  6. Mia
  7. Ella
  8. Ava
  9. Lucy
  10. Sarah
  11. Aoife
  12. Amelia
  13. Hannah
  14. Katie
  15. Chloe
  16. Caoimhe
  17. Saoirse
  18. Kate
  19. Holly
  20. Ruby
  21. Sophia
  22. Anna
  23. Lauren
  24. Leah
  25. Amy
  26. Isabelle
  27. Molly
  28. Ellie
  29. Jessica
  30. Olivia
  31. Roisin
  32. Ciara
  33. Kayla
  34. Julia [tie]
  35. Zoe [tie]
  36. Laura
  37. Niamh
  38. Abbie
  39. Erin
  40. Rachel
  41. Robyn
  42. Aisling
  43. Faye
  44. Rebecca
  45. Eva [tie]
  46. Layla [tie]
  47. Ellen
  48. Cara
  49. Freya
  50. Abigail [tie]
  51. Eve [tie]
  52. Isabella [tie]
  53. Megan
  54. Aine [tie]
  55. Clodagh [tie]
  56. Aoibhinn
  57. Millie
  58. Nicole
  59. Aoibheann
  60. Maja
  61. Sadhbh
  62. Eabha
  63. Charlotte
  64. Amber [tie]
  65. Caitlin [tie]
  66. Sofia [tie]
  67. Alannah
  68. Zara
  69. Alice
  70. Maria
  71. Elizabeth [tie]
  72. Lena [tie]
  73. Mary [tie]
  74. Emilia
  75. Aimee [tie]
  76. Lilly [tie]
  77. Hollie
  78. Aoibhe
  79. Victoria
  80. Eimear [tie]
  81. Maya [tie]
  82. Isabel [tie]
  83. Orla [tie]
  84. Evie
  85. Kayleigh
  86. Brooke [tie]
  87. Clara [tie]
  88. Meabh
  89. Lexi
  90. Tara
  91. Daisy [tie]
  92. Katelyn [tie]
  93. Ailbhe [tie]
  94. Amelie [tie]
  95. Natalia [tie]
  96. Sara [tie]
  97. Hanna [tie]
  98. Laoise [tie]
  99. Ruth [tie]
  100. Madison [tie]
  101. Maeve [tie]
  102. Maisie [tie]
  103. Rose [tie]

Boy Names

  1. Jack
  2. James
  3. Daniel
  4. Sean
  5. Conor
  6. Adam
  7. Harry
  8. Ryan
  9. Dylan
  10. Michael
  11. Luke
  12. Charlie
  13. Liam
  14. Oisin
  15. Cian
  16. Jamie
  17. Thomas
  18. Alex
  19. Noah
  20. Darragh
  21. Patrick
  22. Aaron
  23. Cillian
  24. Matthew
  25. John
  26. Nathan
  27. David [tie]
  28. Fionn [tie]
  29. Evan
  30. Ethan
  31. Jake
  32. Kyle
  33. Rian
  34. Ben [tie]
  35. Max [tie]
  36. Eoin
  37. Tadhg
  38. Finn
  39. Callum
  40. Samuel
  41. Joshua
  42. Rory
  43. Jayden
  44. Joseph
  45. Tyler
  46. Sam
  47. Shane
  48. Mark [tie]
  49. Robert [tie]
  50. Aidan
  51. William
  52. Ronan
  53. Eoghan
  54. Alexander [tie]
  55. Leon [tie]
  56. Cathal
  57. Mason
  58. Tom
  59. Oliver
  60. Andrew
  61. Oscar
  62. Ciaran
  63. Bobby
  64. Jacob
  65. Senan
  66. Rhys
  67. Scott
  68. Benjamin [tie]
  69. Cormac [tie]
  70. Kevin
  71. Lucas
  72. Alan
  73. Donnacha [tie]
  74. Jakub [tie]
  75. Christopher
  76. Filip [tie]
  77. Killian [tie]
  78. Josh
  79. Alfie
  80. Tommy
  81. Ruairi
  82. Odhran
  83. Oran
  84. Leo
  85. Isaac
  86. Dara [tie]
  87. Jason [tie]
  88. Zach
  89. Martin [tie]
  90. Peter [tie]
  91. Brian
  92. Danny
  93. Niall [tie]
  94. Tomas [tie]
  95. Edward [tie]
  96. Stephen [tie]
  97. Logan
  98. Kacper
  99. Anthony
  100. Billy

New to the top 100 list are Isaac, Danny and Logan for boys and Evie, Amelie, Hanna, Maisie and Rose for girls.

Some of the specifically Irish names in the top 100 are…

  • Girls: Aoife, Caoimhe, Saoirse, Roisin, Ciara, Niamh, Aisling, Aine, Clodagh, Aoibhinn, Aoibheann, Sadhbh, Eabha, Aoibhe, Eimear, Meabh, Ailbhe, Laoise, Maeve
  • Boys: Liam, Oisin, Cian, Darragh, Cillian, Fionn, Rian, Eoin, Tadhg, Finn, Callum, Rory, Ronan, Eoghan, Cathal, Ciaran, Senan, Cormac, Donnacha, Ruairi, Odhran, Niall

Sources: Jack and Emily most popular baby names, Irish Babies’ Names – CSO

Image: Adapted from Flag of Ireland (public domain)

Baby names from Cockney rhyming slang?

"A Cockney & his Wife going to Wycombe" (1805)
“A Cockney & his Wife going to Wycombe” (1805)

Here’s something I’ve never seen before.

Last month, Canadian singer Bryan Adams and his girlfriend welcomed their second baby girl, Lula RosyLea. Lula’s middle name is a reference to her time of birth, as per this tweet by Adams:

Lula Rosylea arrived @ teatime this wk. a cup of ‘rosie lee’ = ‘cup of tea’ in cockney. Lula comes from Gene Vincent’s song Be-Bop-A-Lula

This is the first baby I know of to be named via Cockney rhyming slang.

What’s Cockney rhyming slang? It involves word substitution based on rhyme. Typically, a word in a sentence is replaced with a rhyming phrase, and then the rhyming part of the phrase is dropped. This makes the resulting sentence hard for those not in-the-know to understand.

Here’s an example: “Use your loaf.” It’s really “use your head,” but the phrase loaf of bread was used instead of head, and then loaf of bread was shortened to just loaf. Hence, “use your loaf.” Get it?

Speaking of bread, if you’ve ever heard people use the slang word bread to mean money, that’s CRS too. Money rhymes with the old expression bread and honey, which shortens to bread.

So that’s how Bryan Adams turned tea into Rosie Lee, which is a common CRS rhyme for tea. (And now, if you’re ever in London and someone asks you if you want a cup of Rosie, you’ll know what they’re talking about!) “Rosie Lee” refers to American burlesque performer Gypsy Rose Lee (1911-1970).

I thought this was a rather cool way to come up with a baby name, so I’ve collected a few dozen other well-known CRS rhymes that involve names. On the left you’ll find the original word, in the middle is the name/phrase substitution, and on the right is the shortened version.

  • back – rhymes with Cilla Black – shortens to Cilla
  • ball – rhymes with Albert Hall – shortens to Albert
  • belly – rhymes with Darby Kelly – shortens to Darby
  • brake – rhymes with Veronica Lake – shortens to Veronica
  • cake – rhymes with Sexton Blake – shortens to Sexton
  • coat – rhymes with Billy goat – shortens to Billy
  • curry – rhymes with Ruby Murray – shortens to Ruby (if these parents had had a girl instead of a boy, Ruby would have been a great option)
  • door – rhymes with Rory O’Moore – shortens to Rory
  • fairy – rhymes with Julian Clairy – shortens to Julian
  • fish – rhymes with Lillian Gish – shortens to Lillian
  • gin – rhymes with Anne Boleyn – shortens to Ann
  • gin – rhymes with Vera Lynn – shortens to Vera
  • ice – rhymes with Vincent Price – shortens to Vincent
  • kettle – rhymes with Hansel and Gretel – shortens to Hansel
  • lisp – rhymes with Quentin Crisp – shortens to Quentin
  • mess – rhymes with Elliot Ness – shortens to Elliot
  • neck – rhymes with Gregory Peck – shortens to Gregory
  • old man (father) – rhymes with Peter Pan – shortens to Peter
  • rail – rhymes with Toby Ale – shortens to Toby
  • Stella (brand of beer) – rhymes with Yuri Geller – shortens to Yuri
  • Stella – rhymes with Nelson Mandela – shortens to Nelson
  • table – rhymes with Betty Grable – shortens to Betty
  • tea – rhymes with Bruce Lee – shortens to Bruce
  • tea – rhymes with Kiki Dee – shortens to Kiki
  • tea – rhymes with Rosie Lee – shortens to Rosie
  • telly – rhymes with Liza Minnelli – shortens to Liza (e.g., “What’s on the Liza?”)
  • trouble – rhymes with Barney Rubble – shortens to Barney
  • 2:2 (lower second-class honors) – rhymes with Desmond Tutu – shortens to Desmond
  • undies – rhymes with Eddie Grundies – shortens to Eddie
  • wedding – rhymes with Otis Redding – shortens to Otis

I think Darby (for “belly”) might be an especially tempting one baby namers, no? :)

Bryan’s first baby girl, Mirabella Bunny, was born last Easter.

Update, Dec. 2016: A reader named Sam recently told me about the Complete Dictionary of Cockney Rhyming Slang, which contains a bunch more names — like Errol Flynn for “chin,” and Euan Blair for “Leicester Square.” Enjoy!

Sources: Byran Adams on Twitter, Cockney Rhyming Slang
Image: Digital Commonwealth

The names Seventeen, Eighteen, and Nineteen

Baker family on the 1880 U.S. Census
Baker family, 1880 U.S. Census

Yesterday’s post on the Rosado family of Brazil reminded me of a Tennessee family I spotted in the 1880 U.S. Census.

The parents were Stephen and Maria Baker, ages 52 and 45, and the three youngest children were listed as…

  • Billy (?) Seventeen (male, age 4)
  • Lady Eighteen (female, age 3)
  • Aurilla Nineteen (female, age 0)

My hunch is that they were the 17th, 18th, and 19th children, but I haven’t been able to verify it yet.

The older children still at home in 1880 were named Millie, Buddy, Willie, and Albert.

On the 1870 U.S. Census, the family’s children were listed as Rachel, James, Francis, Florence, Milley, Budie, and Wm (an abbreviation for William).