Myfi?

Dear members

Would anyone of you be kind enough to inform me what the letters myfi used for the Rapide Nord passenger cars stands for?
It might be an obvious question, but so far I have been unable to find out.

Vr
LTL

Good morning Larsen,

Perhaps this document could help you, but it is in a French language      

LINK

Regards from Morbihan

Dear friends

Merci Beaucoup!

Well, it certainly solved my problem. I will use it in a danish article about French passenger cars, which are very popular in my club.
Why are they so popular, because of an interesting design and different choise of coulors, but also because of the fact that the first ekspress out of Denmark following the second world war went to Paris: Express du Nord and we try to recreate that on our layout.

Very best regards
LTL
Denmark