I really don't know if this can help you at all. It's the first time I go in this web site. My husband's grandmother is Rosa Acosta (maiden name). Shewas an only child, and was born in 1904 in El Palmar de los Sepulveda, Sinaloa. Her mother was Maclovia Acosta, also born in El Palmar, and died in Niland CA (she is burried in Brawley CA). She never married and I just started our family's tree, so I don't know yet if she had any brothers or sisters. Let me know if you are interested and I will keep you posted.