About Ocallahan
The surname O'Callahan is of Irish origin and is derived from the Gaelic name Ó Ceallacháin, meaning "descendant of Ceallachán." Ceallachán is a personal name derived from the Gaelic word "ceallach," which means "bright-headed" or "warlike." The O'Callahans were a prominent clan in Ireland, particularly in County Cork, and their name is associated with a rich history and heritage in Irish culture.
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The surname Ocallahan is a unique entry in our records. Discover more about its distribution and characteristics:
Below is the ethnic distribution of the surname Ocallahan based on recent US Census records. This is a brief glimpse into the diverse backgrounds of people carrying this surname.
Ranking information for the surname Ocallahan is not currently available.
Here's how to represent Ocallahan in Braille, each pattern of raised dots corresponds to a letter in the name.
The image below shows how you can spell Ocallahan using American Sign Language (ASL). In sign language, each hand shape corresponds to a specific a letter of the name.