From a registered and verified family name historian:
The Irish surname Cregan has two possible origins. While it is certain that
Creegan (a variant of Cregan) of Connacht is an anglicized
form of the Gaelic O’Croidheagain, it would appear
possible that Cregan of Munster and
Another surname for which Cregan may occasionally be a synonym is Crean
(or Creaghan), from the Gaelic O’Croidheain.
The latter sept was a branch of the Cinel Eoghan (a population group
descended from Eoghan, son of Niall of the Nine
Hostages, High King of Ireland, A.D. 379, and which was located in Tyrone and
South Derry) and the family was based in Donegal with a branch in
The Gaelic prefix which originally accompanied this name has, by now, largely fallen into disuse. In general, the prefixes “O” and “Mac” (son of), which incidentally date from the tenth century, tended to be discarded from the seventeenth century and, despite a rival of sorts in the late nineteenth century, under the auspices of the Gaelic league, a movement that did much to regenerate Gaelic culture, there are still, even today, a number of Irish surnames where the prefix is rarely, if ever, seen.
BLAZEN OF ARMS: Per pale argent and gules, a fox rampant of the field counterchanged between three hearts of the third, on a canton sable a hand couped at the wrist or, holding a sword proper entwined with snake vert.
CREST: A lion’s head erased gules.
Dr. Edward MacLysaght’s (1887-1986) on history of Creegan family of Names:
According to MacFirbis,
O’Crean and O’Cregan are
synonymous, Crehan again being a variant of Crean. In Irish Crean and Crehan are Ó Croidheáin (spelt Ó Craidhen by the Four Masters) and Creegan or Cregan is Ó Croidheagáin. These
families formed a minor sept of the Cineal Eoghan belonging to
Donegal, with a branch in the neighbouring