It's not a Welsh name - it's most likely a Latin/French influenced anglicisation of Llewelyn. So I imagine it would be pronounced LEE-o-lin or lee-OL-in.
◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄◄
http://www.behindthename.com/pnl/65849This message was edited 3/7/2011, 6:49 AM