Fiadh makes me think of Fiat (although I know it's not pronounced that way). Fia is a usual Swedish nn for
Sofia or
Sofie. I think it's a bit childish and I've also heard it used as a children's word for vulva...
Does the sea exist
Because of our longing?
My PNL
http://www.behindthename.com/pnl/3258/61573