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What does Cillian mean?

Cillian Pronunciation of Cillian [cil-lian] as a boys' name is of Irish and Gaelic origin, and the meaning of Cillian is "bright-headed". Also possibly "strife" or "monastery, church". See Kelly. Name of various early Irish saints. Killian is the anglicized form.

Associated with: irish, bright, strife (war), monastery, saints.


3 alternative forms via Kelly, Killian: Kilean, Kilian and Killean.

Creative forms:
(male) Cilan, Cilin, ..

(female) Cilian, Cilline, ..

Middle name pairings:
Cillian Malakai (C.M.), ..

How popular is Cillian?

Cillian is an uncommonly occurring given name for men and an equivalently uncommon last name too for all people. (2000 U.S. Demographics)

Cillian entered the list in 2012 and reached its top position of #1407 in the U.S. in 2015. (Top Baby Names, 2015)

Top 2000 baby names ranking of Cillian name in U.S.

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

Which version is better?

with similar and related boy names. Popular related forms of Cillian (#1407 a year ago) are Killian (#348 a year ago), Kilian (#1330) and Kelly (#1582). Other forms, like Killean, are uncommon. These forms of Cillian were at the apex of their popularity in the 1960s (usage of 0.1%) and are now significantly less conventional (usage 0.1%, 52% less), with the version Kelly going out of style. Killian is the most chic boy name among these.

Top 2000 baby names ranking of Cillian, Kelly, Kilian, Killian in U.S.

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

Similar Names

Recommended names are Caelan, Cailean, Cailin, Calan, Callan, Caolan, Colan, Colin, Collen, Collin, Colwin, Cullan, Cullen, Cullin, Cullinan, Dillan, Eilian, Filian, Fillan, Gilian, Gillan, Gillean, Gillian, Gillion, Gillman, Tillman and William. These names tend to be more commonly used than Cillian.

See names
in meaning and etymology.