Rahilly Family History
Rahilly Name Meaning
Irish (Kerry and Cork): perhaps from Ó Raghailligh (see Reilly ) but more likely from the surname Ó Raithile ‘descendant of Raithile’ a personal name of unexplained etymology. This surname is common in Munster where it is also Anglicized as O'Rahilly.
Source: Dictionary of American Family Names 2nd edition, 2022