I found a couple of web sites with lists of makers by country, and currently there are several hundred French makers, and a comparable number of "recent" ones (a hundred years or so is recent for fiddles). Nothing in any of the lists resembled the name(s?) you listed, so I didn't save links.

Eighty years or so old would likely place original(?) manufacture in the 1920s, when there were lots of mass marketers selling instruments under "house names" so even if you can trace it to one of these you may not be able to determine who the actual builder was. This assumes that "identification" is for the sake of "just wanting to know."

If it was given to a child to play - unless she was extremely gifted or her family was quite wealthy - it's unlikely that it was an instrument with "name value" so it's current value will depend on current condition and tone, and perhaps on how expensive any needed adjustments might be. This should be evaluated by a competent player or dealer. If it's "good," it won't make any difference who made it as far as market value is concerned. If it's very good, you may want an appraisal by a "name house" but they usually charge fairly significant fees, so a pre-valuing with a knowledgeable local player/dealer would be in order before checking with Hill & Hill.
(Hill & Hill is just one of the big name guys - it's supposed to impress people in the fiddle business.)

If your friend started young, it needs to be accurately determined whether it's a "real fiddle" or a "student fiddle." Young kids now are often started on 3/4 or smaller student models, but in the 20s there were a fair number of 7/8 size fiddles about, and it may be difficult to distinguish some of these from a full size one.

If you hope to correspond with experts, there are a few standard dimensions that can tell knowledgeable folk a lot about a fiddle. You will need to look at a few fiddle sites, or check one of the many "Instruments of ..." (Stradivari, Amati, etc.) book compilations to see what and how to measure. Photos are helpful, but need to be accompanied by at least a couple of dimensions, accurately measured, since it can be very difficult to judge size from a photo.

The Appraisers' Reference Manual of Authentic Stringed Instruments and Bows 2000 at the "this book" link from kat would probably be helpful - but $190???????? (Ouch/Pain/Writhing/Thrashing).

Incidentally, if there's a bow with it get it checked out separately. Many bows from this era may be worth more than the fiddle they came with, although exhuberant hope is probably not merited.

John