Irish name and byname
1) Gaelic cell/cill = 'cell (in a church or monastery)' 
2) Derived from a word meaning 'battle' 
See also Kilian
|Female ♀||Male ♂|
|#: count of main first name only|
|&: count of both main and additional first names|
| Name counts are approximate as statistics normally is not published
for names given to less than 3 or 5 persons per country.
No recent statistics trend found in databases for Cillian.