Killian meaning, boyKillian

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What does Killian mean?

Killian \k(il)-lian\ as a boys' name is pronounced KIL-ee-an. It is of Irish and Gaelic origin, and the meaning of Killian is "bright-headed". From the same root as Kelly. The name is popular in France.


Killian has 3 variants: Kilean, Kilian and Killean.

For more information, see also the related boy name Cillian.

Killian has 1 more related form via Kelly: Kelley.


Killian is an uncommonly occurring first name for males but a very prominent last name for both adults and children (#2771 out of 150436, Top 2%). (2000 U.S. Census)

Charted below is the birth name popularity of Killian for boys. Killian entered the list in 1995 and reached its apex rank of #516 in the U.S. in the year 2014. (2014 Birth Statistics)

Top 1000 baby names ranking of Killian name in U.S.

Top 100 baby names ranking of Killian outside U.S.

Below is a charted comparison of the popularity of the boy name Killian and affiliated names. Kelly, Kelley and Cillian are the popular alternative forms of Killian (#516 last year) listed in the Top 1000. These boy names reached the apex of their popularity during 1960-1969 (usage of 0.2888%) and have become much less popular since (usage 0.121%, down 58.1%), with the forms Kelley and Kelly becoming less stylish. Killian (#516) is the most fashionable name for newborns in this list. (2014 Birth Statistics)

Top 1000 baby names ranking of Kelley, Kelly, Killian in U.S.

Top 100 baby names ranking of Cillian, Killian outside U.S.

Similar Names

Killian is pronounced similarly to Keillan, Kellan and Kellin. Another suggested similar baby name is Gillian. Like Killian, these names are not commonly used.