If I had a dd tomorrow, her name would be
Niamh Annmarie.
Niamh is utterly gorgeous.
I used to adore
Eibhlin, when I thought it was pronounced like the British pronunciaiton of
Evelyn, i.e., "EVE-lin." Since I was disabused of this notion, I've seen many pronunciations. Yours is very pretty, but if I can't be certain how it is pronounced, then I can't get too excited about the name. Pooh.
Lucienne would be very pretty with either name. I like French names paired with Irish ones. :-)