Riordan Family History
Riordan Name Meaning
Irish (Kerry): shortened form of O'Riordan an Anglicized form of Gaelic Ó Ríoghbhárdáin ‘descendant of Rióghbhárdán’ a byname composed of the elements ríogh- ‘royal’ + a diminutive of bárd ‘bard poet’.
Source: Dictionary of American Family Names 2nd edition, 2022