There is a character in the Harry Potter series with that name and when I was younger I had never heard of it before so I pronounced it Sea-mus. But yeah it's supposed to be Shay-mus.
Even thought it is a name, I think the spelling is awful. The sound of it I don't mind, but the spelling ruins it for me and I could never use it for that reason (unless I was living in Ireland where it probably wouldn't be an issue).
Re: Seamus?
You're correct.?
There is a character in the Harry Potter series with that name and when I was younger I had never heard of it before so I pronounced it Sea-mus. But yeah it's supposed to be Shay-mus.
this ^ people have suggested it to me since dh is shane and i'm not sure if they were joking or not.