The story
- Irish · derived fromÓ Céileacháin“descendant of Céileachán”
- English todayKeelan
Two main etymologies: * Reduced Anglicized form of Irish Ó Céileacháin (“descendant of Céileachán”), a diminutive of céile (“companion”). * Welsh habitational surname for someone from Cilan.
Etymology from Wiktionary, CC BY-SA 4.0.