Hi Luke, yes you're right. Israel Valade and Christine Chevrier had a daughter named Malvina who married Louis Vernier. My grandmother, Clara Vernier, was their daughter. I know that she had three brothers named Privat, Donat and Romuald. Romuald was my father's godfather.
Do you have any information about any of these ancestors? Are you related to the Valade lineage also?