Killian

Patronymic

Meaning

Descendant of Cillian, a name derived from the Irish word for church or cell.

Etymology

An anglicized form of the Irish patronymic Ó Cillín or Mac Cillín, derived from the personal name Cillian. The name comes from 'cill' meaning church or monastic cell.

About the Killian Surname

An Irish patronymic surname with ecclesiastical origins reflecting the importance of the Church in Irish society. The name has spread internationally through Irish emigration.

Distribution & Frequency

Estimated 8,000 bearers in the United States #1,263 most common surname
Rare Common

Primarily found in Ireland and among Irish diaspora communities worldwide.

Killian Surname Distribution

Geographic distribution based on Civil War military records.

Fewer
More

Notable Bearers

People with the Killian Surname