I am looking for information on Juan de D. Romero born in Sonora in 1800. He is in the Arizona City (Yuma) AZ 1870 census with his wife Dolores b. 1817 in Sonora. It appears that he had a daughter Clara b. 1842, Sonora who married ? CELAYA. Clara's eldest daughter was born in Sonora as well - Dolores S. in 1859. By 1870, Clara is living in Yuma with her parents, without her husband and also has another daughter, Francisca b. 1870 in Yuma.
I do not have any areas to even begin searching for these people - any clues?