Roibín
In Irish it's: A Bobby, a chara / A Bobby dhil
Yes. 4th Generation Irish.
Johnson is not an Irish name. This is not to say there are not Johnsons with Irish ancestry. So no Irish county is associated with the name Johnson.
The form used in Irish is Heather as in English.
match-you
As a male name, Dónall.
Yeah I would say if was
YES! Some say it's the Irish version of Charles, but that is not true.
Devin in Irish is 'Dubhain's Heir'. It is a very popular boy name.
If a given name it would stay the same; no Irish equivalent.
The native Irish name Doireann has been wrongly anglicized as Dorothy.
The name has no Irish language version; it's still spelled Irene.