The official name changed also a few times. There was an addition 'Pro', dropped later. 

Adding colloquial names does not necessarily help referencing though. The P4 female was popular and unversely called 'Posette',  yet I cannot find that name as the name of any folder.

If they must have colloquial names, let it be Brigitte and Bertrand: Identical first character by tradition (Jessy and James, Roxy and Rex, Sidney and Simon), spelled without diacritics, and her name spelled the French way just to remind Americans and British their languages together come only third in terms of number of people speaking it natively, after Mandarin Chinese and Spanish, losing ground quickly to running- up number four: Hindi (https://en.m.wikipedia.org/wiki/List_of_languages_by_number_of_native_speakers)