Diana
This English surname apparently has no Gaelic form.
Dante (no Gaelic form)
The Gaelic form of Alana is Alannah.COMMENT:No it is not; Alannah is an anglicized version of "a leanbh" (o child, in the vocative case) or alternately a feminine form of Alan. It is not a Gaelic form.
No Irish Gaelic form
You don't; it has no Gaelic form to my knowledge.
This sort of name is left in the original form even if the last name is in an Irish Gaelic or Scottish Gaelic form.
Eom? Possibly Eoin? It is a Gaelic form of John.
There is no Gaelic form of the name, if that's what you mean.
Niall is the Irish Gaelic form
Tegan is the Welsh original, it has no Gaelic form.
The Irish Gaelic form of Kenneth is Cionaodh;the Scots Gaelic is Coinneach.
The Scottish Gaelic form of Sinclair is Mac na Ceàrda.