Are you missing a name from your PH example perhaps? Everyone I've known there has their mother's maiden name as a middle name, and father's last as last name.

Are you missing a name from your PH example perhaps? Everyone I've known there has their mother's maiden name as a middle name, and father's last as last name. Then on marriage sliding the original last name to the middle name. But one thing I did notice is that very few go by any given name, usually a play on it or a nickname instead.