Cillian as a Baby Name. Meaning and Origin of Cillian

What is the meaning of the name Cillian ?

The baby name Cillian is a Male name , 3 syllables long and is pronounced KIL-ee-ən,/ˈkɪliən/ (IPA),KIL-yən (/ˈkɪljən/).

Cillian is Irish in Origin.

Cillian is an Irish masculine name from Gaelic Cillín, a diminutive of cill “church,” yielding the sense “little church/monastic cell.” Some scholars also connect it with the Old Irish personal name Cellach/Ceallach, whose debated root may denote “war, strife” (less often “bright-headed”); both strands help explain its early ecclesiastical and heroic associations.

The name appears in early medieval Ireland and on the Continent through Saint Cillian (Kilian), a 7th‑century Irish missionary and martyr venerated in Würzburg, which spread the German form Kilian and the English/Anglicized Killian. A second Irish saint of the same name anchors its native use. Cillian has enjoyed a modern revival in Ireland and abroad, boosted by actor Cillian Murphy, and now ranks comfortably in English-speaking baby lists. Established variants include Cillian, Killian, and Kilian; related Irish forms are Cillín and the older Cellach/Ceallach. Short forms such as Cill or Killie sometimes occur.