A final question if I may... :o)
with all the information you've found for me, it looks like there are potentially 3 living relatives of mine who were three of John Jennings daughters - Mary, Barbara and Judy. You managed to get addresses for Mary and Barbara - do you know if they are recent addresses in recent electoral rolls? It would be fantastic if I could get in touch with them.

Name: Mary C Jennings Smith
Birth Date: 29 Mar 1949
Address: 643 Banjo CT, San Marcos, CA, 92069-1905
Address: 780 Poppy Rd, San Marcos, CA, 92078-6904

Name: Barbara A Jennings
Birth Date: 17 Nov 1952
Address: 305 Miramar Dr, El Granada, CA, 94018
Address: 640 Johnston St, Half Moon Bay, CA, 94019-1913
Address: 10317 Brookside Dr, Middletown, CA, 95461

Name: Judy Alice Jennings
Birth Date: 28 Oct 1955
Gender: Female
Mother's Maiden Name: Lerner
Birth County: Sonoma