The Irish surname 'mac Conghail' is pronounced as "mack-KOHN-gal."
It doesn't have an Irish meaning as it is an English surname.
Irish isn't ancient it is still spoken Ó Maoilchluiche - O Meel-khlih-heh
It is Goisdealbh which is the origin of the surname Costello(e).
'Kerr' is not a word in the Irish language.
Sean Patrick Hourihan is 6' 2".
Correctly spelled Fionnagán seen in the Irish surname Ó Fionnagáin, sounds roughly like finn-a-gaun.
No, it is not of Irish origin. It is mostly an English surname, but occassionally a Scottish surname as well.
The Irish version of the surname Burke is "de Búrca."
The proper way to pronounce the surname 'McLachlan' is 'Mac Locklin'
The Irish form of the surname Hackett is Haicéad, pronounced somewhat like'hack-ade'. The form Haicéid is also seen.(The Munster dialect stresses the second syllable: hack-ADE.)
As far as I can tell it is not a strictly Irish surname. But it does come from the the British Isle.