Variant of Keegan, an Irish surname anglicized from Mac Aodhagáin meaning 'son of Egan, little fire'.
Keegun is a variant of Keegan, an Irish surname anglicized from Mac Aodhagáin, meaning 'son of Egan' and often glossed as 'little fire.' That gives the name a lively Irish background and a meaning that suggests warmth, energy, and spark.
The spelling variation makes it feel a little more contemporary while preserving the surname-rooted identity. In use, Keegun sounds brisk and modern, but with enough Irish texture to keep it from feeling generic. The fire association gives it a spirited edge, and the surname origin gives it stability.
It belongs to the modern tendency to turn surnames and surname-like forms into given names, especially when they carry vivid meanings. Keegun feels energetic, compact, and lightly rugged.