Okay, I found a listing in the 1910 census for a "Mary Rutherford" born in 1869, living in the Los Angeles area (i.e. Long Beach), but I have no idea if it is the same person because there is no index for the 1910 census to the actual individual entries:
Meanwhile, I found a listing for "Joseph Rutherford," aged 11, resident of Haw Creek, Morgan, Missouri. Looks like he grew up in a big family. His father is listed as James Rutherford, aged 43, whose occupation was listed as "farmer". James Rutherford was born in Michner, Tennessee. Joseph's mother was named "Lanora Rutherford," aged 37, who was born in Senneku, Tennessee. Her occupation was "keeping house". They had 7 children (!). The oldest child was Virginia (sp.?), aged 20, who was employed as a school teacher. The next two oldest children were also girls, Anna (aged 19) and Salena (aged 17). Hmmm, does it sound like the Rutherfords were trying hard to have a son? The next oldest children were William, aged 15, and Florence, aged 13. Then, finally, do we come to Joseph, aged 11. But he wasn't the youngest child. Well, for much of his young life he was, but the Rutherfords had one last son, Berkie (sp?), who was aged 4 at the time of the census. No other occupation was given for the other children, except for William who was stated as "works on farm".I have copies of each of these censuses.On edit: The 1870 census lists a "Mary Fetzer" from Hannover, Germany living in Boonville, Cooper, Missouri. Cooper is the county that BeelzeDub gave as where little Mary was raised. It looks like it might be more accurate to say that Mary was born in Cooper county and then moved before the age of 11 to Rolla in Phelps County. The 1870 census also states that mother Mary was married to a physician named John Fetzer who was born in Wirtemberg, Germany. John Fetzer appears to have been somewhat wealthy; the value of his real estate was $15,000 and the value of his personal estate was $300. Mary Rutherford also appears to have had several siblings, such as Anna (aged 16), a brother F. (aged 15), a sister M. (aged 10/12), and a brother R. (aged 4). Little Mary would've been an infant at the time of this census so she wasn't counted.
Name: Mary Rutherford Age in 1910: 40 Estimated Birth Year: 1869 Home in 1910: 1-WD LONG BEACH, LOS ANGELES, California Race: White Gender: Female Series: T624 Roll: 85 Part: 2 Page: 41B Year: 1910
I also checked the 1880 census for Missouri and found the entry on the Fetzers. Mary's father is listed as John Fetzer, aged 55 (thus born in 1825). John Fetzer's occupation is listed as "physician," and his place of birth is stated as Westerberg, Germany. This neatly confirms what the later California census data stated, that Mary Rutherford's father was a native of Germany. John Fetzer's wife was listed as Mary Fetzer, aged 44, with her occupation stated as "keeping house". Mary's birthplace is given as Hannover, Germany. Interestingly, Mary declared in later censuses that her mother was from France. I'm not sure if this is accounted for by a post-WWI change in borders and if Hanover at one point was part of Belgium. The single child of the Fetzers was named as "Mary Fetzer," who was born in Missouri and whose age was given as 11. The Fetzers also had a live-in servant named Hannah Prigg, aged 18, and they all lived in Rolla, Phelps, Missouri.Meanwhile, I found a listing for "Joseph Rutherford," aged 11, resident of Haw Creek, Morgan, Missouri. Looks like he grew up in a big family. His father is listed as James Rutherford, aged 43, whose occupation was listed as "farmer". James Rutherford was born in Michner, Tennessee. Joseph's mother was named "Lanora Rutherford," aged 37, who was born in Senneku, Tennessee. Her occupation was "keeping house". They had 7 children (!). The oldest child was Virginia (sp.?), aged 20, who was employed as a school teacher. The next two oldest children were also girls, Anna (aged 19) and Salena (aged 17). Hmmm, does it sound like the Rutherfords were trying hard to have a son? The next oldest children were William, aged 15, and Florence, aged 13. Then, finally, do we come to Joseph, aged 11. But he wasn't the youngest child. Well, for much of his young life he was, but the Rutherfords had one last son, Berkie (sp?), who was aged 4 at the time of the census. No other occupation was given for the other children, except for William who was stated as "works on farm".I have copies of each of these censuses.On edit: The 1870 census lists a "Mary Fetzer" from Hannover, Germany living in Boonville, Cooper, Missouri. Cooper is the county that BeelzeDub gave as where little Mary was raised. It looks like it might be more accurate to say that Mary was born in Cooper county and then moved before the age of 11 to Rolla in Phelps County. The 1870 census also states that mother Mary was married to a physician named John Fetzer who was born in Wirtemberg, Germany. John Fetzer appears to have been somewhat wealthy; the value of his real estate was $15,000 and the value of his personal estate was $300. Mary Rutherford also appears to have had several siblings, such as Anna (aged 16), a brother F. (aged 15), a sister M. (aged 10/12), and a brother R. (aged 4). Little Mary would've been an infant at the time of this census so she wasn't counted.