from your list I love Matilda, Olive, Fiona, Iris, Gwyneth, Thea, Helena, and Genevieve. for boys I like Linus, Cedric, Silas, Conrad, Arthur, Simon, Malcolm, Sullivan, and Theodore. I also like...
girls: Bridget, Aisling, Aislinn, Katie, Aoife, Eimile, Caitlin, Siobhan, Leanne, Victeoiria, Isibéal, Kathleen, Abaigeal, Christie, Emma, Lucy, and Erin
boys: Connor, Shawn/Sean, Eoin, James, Seamus, Jack, Néall, Adam, Ian, Evan, Ryan, Dylan, Cillian, Reece, William, Liam, Patrick, and Pádraig
also, not sure how to spell it but I know a little Irish girl whose name is pronounced A-lish.
Which of these do you think are usable in the US?
Just from the names I suggested the most usuable in the U.S. are probably:
girls: Bridget-very usable
Aisling/Aislinn-I think most people know how to pronounce this
Aoife-probably a little harder to pronounce
Eimile-seems hard but easy to figure out
Caitlin-very easy to pronounce
Siobhan-I think this one is possible
Leanne-easy to prounce
Victeoiria-defintely one of the harder ones, she would just be called Victoria
Isibéal-easy enough to figure out
Kathleen- easy to pronounce
Abaigeal-really just Abigail spelled differently
Christie, Emma, Lucy, and Erin-all easy to pronounce
boys: Connor-easy to pronounce
Shawn/Sean-easy to pronounce
Eoin-I think most people know this is pronounce Owen
James, Seamus, Jack-easy to pronounce
Néall-might be a harder one
Adam, Ian, Evan, Ryan, Dylan-all easy to pronounce
Cillian-hoenstly, I always have a hard time with this one
Reece, William, Liam, Patrick-easy to pronounce
Pádraig-one of the hardest to say
I'm on my phone at work so can't see all replies so hopefully i won't repeat to many but just off teh top of my head thinking of names i know/hear/see locally - I live in the highlands of Scotland here's my suggestions of Scottish girls names, mainly people i work with or wnet to schoold with. Very varied taste so i imagine you'll be able to delete the bulk of them to get the ones that fit your style.
Flora - gutted my new neice is called this or would be serious contender fo rbaby number 2
Lorna - this is due a comeback IMO
A lot of these will probably qualify as Irish origin as well as we share gaelic/celtic heritage.
P.S. Cormac is one of my top 3 for a boy so thumbs up from me!