Small flame or son of Egan
Keeghan is a modern spelling variant of the Irish surname Keegan, which is an anglicized form of Mac AodhagΓ‘in. The name ultimately derives from the Gaelic name Aodh, meaning 'fire', combined with a diminutive suffix.
Less common today
Keeghan isn't in the latest US Top 1000. It last peaked at #3,631 in 2008.
US births per 5-year period, 1990βpresent (SSA data).