My SIL is Irish, so the names are unique here but are very common in Ireland.

Aoife (eefa)
Aisling (ashling)
Audrey

My little girl is named Tess Alice, it's not unusual, just don't know anyone who has named a girl Tess. The MW made a comment after the birth that she hadn't heard that name in a very long time.
My GF had a baby the same time and named her Ingrid, another one I haven't heard for quite some time.
If you look on Births, deaths & Marriages website you can go back as far as Birth's have been registered to get some of the older names not used any more.