Nicknames for Cillian
10 nicknames, sorted by where they actually get used.
Office-safe
Cil
formal
Cill
formal
Ian
formal
Playground-friendly
Cilly
casual
Cillie
casual
Iany
casual
Ianie
casual
Ciy
casual
Ciie
casual
Family nicknames
Cilkins
endearment
About Cillian nicknames: Most parents pick Cillian for the full formal sound. Then they reach for a shorter form at home. The office version and the playground version are usually different — that's the split above.