Irish Gaelic name of uncertain origin. Theories include:
1) Irish Gaelic ? = 'bright-headed' 
For female forms see Kelly f
|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 Ceallagh.