I have a difficult ancestor to find. My Great Grandmother was Concepcion Bojorques/z. We've always been told that she was from France, that she had a French father and a Spanish mother. That she came from France to Guaymas MX in the 1850's with her brother Juan. She married my Grandfather (Ramon Duarte) in Guaymas Mexico in Feb. 1854. I have this marriage certificate but it doesn't give any clues as to where Concepcion was born. How do I find the city in France where she was born? All my 19, (yes I said 19), aunts and uncles from one of Concepcion's children are all passed. The oldest living relative is a first cousin of mine, GGson to Concepcion, he's 79. I'm the baby of the baby of these 20 children and do not know much more.I have been trying for years to get a clue as to her birth. I NEED ALL THE HELP I CAN GET. PLEEEEASE, if you have any suggestions/help you can give, I am deeply appreciative.Be it clues for searching in France or Mexico.Thanks.