Across the world, Caitlín (Caitlin 
, Cateline 
, Caitlín 
) is a common feminine first name. The first name Caitlín is habitual in Australia, where it is quite a common feminine name, the United States, and Guernsey (explore the name in all countries). Measured by absolute frequency, this name is the most popular in the United States, Australia, and the United Kingdom.
| VARIANT | COUNTRY |
|---|---|
| Caitlin | Australia, South Africa, Canada, United States, United Kingdom |
| Cateline | South Africa, Canada, United Kingdom, United States, Belgium |
| Caitlín | United Kingdom, Ireland, United States |
| Кэтлин | Russia |
Caitlín is also a popular name for the fictitious and mythical characters: Caitlin Snow , the fictional character from the television series The Flash; Killer Frost , the fictional character from DC Comics, The Flash; Caitlin Fairchild , the fictional comic book superhero; Caitlin Snow , the DC Comics character, The Flash and Kath Day-Knight , the fictional character from Kath & Kim, Kath & Kimderella, and in many other works.
| caitlín brugha Irish politician (1879-1959), IE (b. 1879) |
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| caitlín ní thoirbheird Gaelic League activist, IE (b. 1891) |
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caitlín maude Irish poet, actor and singer, IE (b. 1941) |
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| caitlín uí mhaoileoin Irish musician and civil servant, GB (b. 1940) |
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| caitlín eilís barrett author (b. 1950) |
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| caitlín ní chualáin Irish singer, IE |
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| caitlín nic aoidh Irish weather presenter, IE |
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| caitlín ní chasaide researcher (ORCID 0000-0001-7016-2468) |
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Anna, Kearney, Doherty, Godfrey, Griffin, O'Neill, O'Leary, Wallace, Mccarthy, Mcerlean, Sheridan, Chasaide, Cosgrove, Kinsella, Donnelly, Houlihan, Hilliard, Finnerty, O'Mahony, Mcdonnell, Greenwood, Hennessey, Choisdealbha, Chearúlláin, Chinnéide, Seoighe, Bent, Ross, Daly, Adams, Burns, Kelly, Owens, Oakes, Íomhair, Morgan, Mcloughlin, Mooney, Murphy, Mullan, Anluain, Carlin, Cooney, Cullen, Pierce, Hodges, Ferran, Mcmahon, Murray, and O'Sullivan