Hi Meghan. I have done some searching and maybe found a few tid bits for you.

re: George St Clair JACOB md Helene/a KELL(E)Y, c 1897/98

California Death Index, 1940-1997
Name: George S Jacob
Social Security #: 572105963
Sex: MALE
Birth Date: 8 Jan 1879
Birthplace: Massachusetts
Death Date: 24 Oct 1945
Death Place: San Joaquin
Mother's Maiden Name: Fraser
FATHER'S SURNAME: Jacob

*can't find Helene/Helena in the CADI; unless this is her and her age is a typo error;
JACOBS Helen G, spouse G, age 32 or 37, d.San Joaquin Co, 11/1/18

California Death Index, 1940-1997
Name: Jerry Agnes Day [Jerry Agnes Jacob]
Social Security #: 564280251
Sex: FEMALE
Birth Date: 9 Jan 1910
Birthplace: California
Death Date: 5 Nov 1988
Death Place: San Joaquin
Mother's Maiden Name: Kelly
FATHER'S SURNAME: Jacob

California Death Index, 1940-1997
Name: Lillian G Saddington [Lillian G Jacob]
Social Security #: 554246976
Sex: FEMALE
Birth Date: 8 Sep 1906
Birthplace: California
Death Date: 26 Apr 1985
Death Place: San Joaquin
Mother's Maiden Name: Kelly
FATHER'S SURNAME: Jacob

poss. Lillian's husband;
California Death Index, 1940-1997
Name: Charles A Saddington
Social Security #: 555050630
Sex: MALE
Birth Date: 9 Mar 1908
Birthplace: California
Death Date: 15 Mar 1983
Death Place: San Joaquin

California Death Index, 1940-1997
Name: Charles A Saddington
Social Security #: 555050630
Sex: MALE
Birth Date: 9 Mar 1908
Birthplace: California
Death Date: 15 Mar 1983
Death Place: San Joaquin


.............
World War I Draft Registration Cards, 1917-1918
Name: George Stclair Jacob
City: Stockton
County: San Joaquin
State: California
Birth Date: 8 Jan 1878
Race: White
Roll: 1544418
DraftBoard: 0
add: 828 E Channel, Stockton, San Joaq. Cal
40y, b.Jan.8th 1878
white, native born,
occ: Assembling, Samson Sieve Grip Tractor Co, 1104 S Aurora, Stockton, San
Joaq. Cal
nearest relative: Lena G. Jacob, wife, 828 E Channel, Stockton, San Joaq.
Cal
medium height/build, brown eyes, dark hair,
signed Sep. 7th, 1918, Stockton Cal
.............
re:Ruth

maybe Ruth? only Ruth I found in CADI w/m.m.n. JACOB;
California Death Index, 1940-1997
Name: Ruth E Morrow [Ruth E Andrews]
Social Security #: 561328948
Sex: FEMALE
Birth Date: 9 Apr 1923
Birthplace: California
Death Date: 16 Nov 1988
Death Place: San Joaquin
Mother's Maiden Name: Jacob
FATHER'S SURNAME: Andrews

? maybe Ruth was registered as Elizabet(h) and her name changed later or nic-name?
California Birth Index, 1905-1995
Name: Elizabet F Andrews
Birth Date: 9 Apr 1923
Gender: Female
Mother's Maiden Name: Jacob
Birth County: San Joaquin

I found some other census and birth info as well, if you like you can contact me ...
nlfriley at bellnet dot ca

Nanc