My take (as a non-Irish person) is that
Shelagh is a more Irish-looking Anglicization of
Síle, like
Darragh vs.
Dáire.
To answer the original post, I have only seen
Sheila spelled as
Shelagh on the character in the show Call the Midwife. I think it looks much more appealing than
Síle. I dislike the name
Sheila in the first place, though, but would say it's my favorite spelling.
This message was edited 4/30/2015, 3:12 PM