The English-language surname Healy is in use by three separate ancestral lines of people from Ireland.
When Irish people began to anglicise their names, two separate clans adopted the English-language surname of "Healy".
There was the Ó hÉilidhe clan from Connaught and the Ó hÉalaighthe clan from Munster.
[citation needed] Many different spellings of the surname exist including Haly, Haley, Haily, Healey, Hely, O'Healey and O'Haly.