The name Kieran is a girl's name of Irish origin meaning "little black-haired one".

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Kieran is a boys' name that could cross over, as an update of outmoded Karen or a variation on trendy Kiera (or Keira or Kyra).  Keren Ann is an Israeli-born singer.  The proportion of babies named Kieran who are girls is less than ten percent, but is slowly growing. Kieran had an increase in use for girls in 2022.

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Kieran

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The name Kieran peaked for girls at #2354 in 1998. Kieran is also used for boys, ranking #389 in 2025.

The name Kieran is a boy's name of Irish origin meaning "little black-haired one".

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Long popular in Ireland and England, Kieran, the name of Ireland's first-born saint and twenty-five other saints, has been building its U.S. fan base thanks to its strong and attractive sound, and its fashionable Irish brogue. While Ciaran is the more authentic Irish spelling, Kieran is more popular this side of the Atlantic.  
<br/><br/>Julianna Margulies chose Kieran for her son, and Kieran is a Culkin brother to Macaulay and Rory. Kier is an attractive short form, and Kiera/Keira is Kieran's girl twin.

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The name Kieran is currently ranked #389 in U.S. births. and peaked for boys at #389 in 2025. The name is most popular in KIERAN, KIERAN, and KIERAN. Kieran is occasionally used for girls in 2025.

Ciarán

Kier

Year	US rank	Births	Per million
2014	#4,409	33	18.5
2015	#4,793	29	16.2
2016	—	0	0
2017	#4,263	34	19.7
2018	—	0	0
2019	—	0	0
2020	—	0	0
2021	—	0	0
2022	#4,527	31	18.9
2023	—	0	0
2024	—	0	0
2025	—	0	0

Kieran

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