Yay I love to see Irish names being appreciated! Here are some of my faves…
Lasairfhíona - Omg I’ve never seen her on the forums before! One of my neighbours had a cat with this name (lol!) and called her Lazzy, so it feels very sweet and a little sassy to me. 
Eithne - Gorgeous and fiery! I’ve always thought that the meaning is quite cute too 
Onóra - So elegant!
Tuathla - Ooo I’ve never seen this gem before! A fun spin on Tallulah!
Eileanóra - Reminds me of a bouquet of flowers! 
Éadaoin - Sooo cute. Nickname Eadie as well!? 
Tadhg - Love it, and the meaning too 
Faolán - Adorablee! I think that Faolán and Oisín would make great brothers, because they mean ‘little wolf’ and ‘little deer’ 
Liam - A classic!
Fiachra - So cool, with an edge!
Art - My favourite Arthur nickname of all time! 
Sibsets I’ve come up with…
Tuathla & Líadan
Saorla & Sadbh
Méadbh & Gearóid
Cadhla & Liam
Dónal & Tadhg
Lorcan & Fiachra