Hello I just checked on Mathilde's US passport and the date is written in English July 3,1920.So, whatever that would be in French?
Mathilde was born in Buenos Aires around 1891. I have not found a certain match.I have found 1 person on FamilySearch.org that matches, but..I am not sure it is my grandmother. Only if she was adopted by her mother;s sister maybe??? Mathilde lived in Buenos Aires with her parents Jeanne and Armand Lagneau and returned to France with them I believe in 1916.
I was hoping Mathilde's marriage certificate would give me some clues about her past.