hm... the suffix directions specifically say "Preferably, this should only be used for the Suffix at Birth." Prefix doesn't make any specifications, I hadn't thought about general naming convention:
"We aim to use the names that people themselves would have known and that would have been recognized in their own time and place."
This goes on to say : This is true for the "official name fields", Proper First Name and Last Name at Birth, and it's also true for the "preferred name fields", Preferred First Name and Current Last Name. These are meant to be the names they would prefer, not the names we prefer to call them.
My point being the naming guidelines don't specifically say use their conventions for prefix.
Am I nit-picking? :)