Via Franks. [Edit: I thought it was but he got it here; moved this post and the next from Stats thread]
I wouldn't have guessed Power. But it does make sense. Any name as likely to be Catholic as Protestant is sure to be up there.
I only know one Smith family (a cousin married into it). I know one White (and her husband's name is Green so when he proposed he asked if she wanted to change her colour lol). I know of lots of Parsons. There are a few MHAs with that surname right now.