The name Mathilde is a girl's name of French origin. Mathilde and is often added to user-created lists like Vintage French Girl's Names and discussed in our forums with posts like "Baby a Day".
From the experts:
Mathilde is even more popular in France than Matilda, a hipster favorite thanks to Michelle Williams and Heath Ledger, is here. And the French pronunciation, while confusing to English speakers, makes it softer and prettier than the version we're more familiar with.