It's already written in Irish.
Surname or personal name?
shannon
They would be the same as in English.
The name would be equated with Aodh (as is Hugh).
as Gaeilge
The Irish language Bible gives Miriám as Miriam.
Rinne mé.
cúig
SibealÉilís
fírinne
Seán
In the Irish language: Ó Duibhir