In Irish it's "Uilliam"
In Scottish Gaelic: Uilleam; Liam is more common in Irish.
If that is the correct spelling, it is not Gaelic.
In Scottish Gaelic it is spelled Mòrag.
MacÌosaig
Easáias (from the Irish Bible); Isaiah in Scottish Gaelic.
In Scots Gaelic MacAulay is MacAmhlaigh; 'the MacAulays' however is Clann 'IcAmhlaigh.
The correct spelling is Gaelic (Scottish or Irish dialects).
duine as Óileáin Sgitheanach / Albanach
The spelling doesn't appear to be correct.
Uilleam is the Gaelic spelling for William.
Irish (Gaelic): Éirinn go brách (aer'-rin guh brawch) Scottish Gaelic: ...
It appears there is no Irish or Scottish Gaelic version of Genevieve. It would remain the same.
slaandjivaa ("to your health" essentially)