Ó Beacháin
Ó BEACHÁIN—I—O Beaghane, O Beghan, O Behan, Beaghan, Beahan, Behane, Behan, Beegan, Beane, Bean; 'descendant of Beachán' (diminutive of beach, a bee, a name applied to a child); the name of a literary family in Offaly and Leix, now widely spread through Leinster and Munster.
Alphabetical Index to Irish Surnames