Caitlin and I have no Irish connections either so ner
Eilish (pronounced Eye-lish) - again Irish name, causes a lot of confusion now we live in Scotland as people pronounce it Ay-lish (also know an Irish Eilish who pronounces her name Ay-lish - you following me here? )
And Calum. Dh is one quarter Scottish, so is that allowed?
Other choices for Calum - Cameron, Connor, Hamish. If he was a girl he would have been Ishbel.