The Irish surname Kelley is of patronymic origin deriving from the Gaelic name O'Ceallaigh, meaning "strife" or "contention". The main (O')Kelley clan belonged to Ui Maine (mid Galway and South Roscommon), and the reigning chieftain, O'Ceallaigh (circa 1351), was a renowned patron of the arts. O'Kelly of Gallagh, whose claim to the designation chief of the name is officially recognized. Today the name Kelley is found throughout Ireland and is very popular in England, Australia and the US. Buy men's rings.