Son of Egan; little fire
Kiegan is a modern spelling variant of the Irish surname Keegan. It derives from the Gaelic Mac AodhagΓ‘in, meaning 'son of AodhagΓ‘n,' which is a diminutive of the name Aodh, the ancient Irish god of fire.
Less common today
Kiegan isn't in the latest US Top 1000. It last peaked at #5,411 in 2008.
US births per 5-year period, 1990βpresent (SSA data).