When you post, it's important to fully identify the person you seek. Post their FULL date of births if you have them, that helps to identify one person from another having the same name. Identify specifically what you seek. If you already have the US Census, or other information, identify that you have it.
Now, bottom line first: I found a Henry Maier in the World War I and World War II draft registrations that was born October 9, 1886. BUT, this might not be the correct person you seek, although this one was in Rupert, North Dakota in 1942/with indications of being also in California. I found a couple that is probably Henry and Christina buried in California; but, you may know if this is correct or not. If this is the correct couple, besides the cemetery research I suggested, you might also attempt to obtain their obituaries in Lodi, California. If you have additional information on Wilhemina Pfaff, you might want to also fully identify her.
The 1920 Census for Melville, Grant County, North Dakota, Renting his land.
Henry Maier, age 33, born in Russia to both parents born in Russia (all spoke German, immigrated in 1906, "Pa" (see below). He is a farmer/General Farming
-Christine, wife, age 27(1892/1893), born in Russia to both parents born in Russia (all spoke German), immigrated 1909. Shown as "Al" for Alien.
-Alma, age 6(1913/1914), born in North Dakota
---The "Pa" is the answer to the question as to citizenship. "Pa" means PAPERS, it means he has submitted his Declaration of Intention to become a citizen. That "Pa" is what the enumerators were told to write for immigrants that were not Naturalized (Na), or had not yet filed their intent (Al for Alien). It does NOT MEAN "pending papers" as the other poster likes to continuously write in error, there are no papers pending...
Henry Maier's naturalization process is noted here:http://library.ndsu.edu/db/naturalization/
---During this time period there was a MASS of Menonite's that immigrated from Russia. They were originally residents of Germany, but when their religious rights were being infringed, they moved in mass to various communes in Russia. When Russia then began infringing upon their rights, specifically requiring military service, they left in mass to the central USA.
Here might be a start for your research into this:http://library.ndsu.edu/repository/handle/10365/5711
The World War I Draft Registration Card image database:
Henry Maier, born October 9, 1886 in Cherow, Russia, Citizenship: Declared Intentions, farmer, wife and one child. He was a farmer, living in Inga, Chouteau County, Montana. This person registered on June 5, 1917 as required (National Registration Day)
--World War II Draft Registration Card Image Database:
Henry Maier, born October 9, 1886 in Russia. Residence: "R(Route) 1, Rupert, Minidoka Co, Idaho. Written in pencil above was "Box 22, Florin Calif." Person who will always know your address: "Ed Plocher, Rupert, ID" He was 5'-6", 160 pounds, had a mole-rear of left eye, Hazel eyes, Gray hair. He registered on April 27, 1942, at the Local Board, Court House, Rupert, ID
NOTE: Both of these Draft Registration identify the same name and same Date-of-Birth of October 9, 1886.
--Florin is an area in Sacramento County, CA.
Ed Plocher is identified as Edward Plocher, born 24 Oct 1887, died 29 April 1944 in Rupert, Minidoka County. His WWII draft registration identified he was born in Odesa, Russia. The person who will always know his address was Miss Emma Plocher. Edward appears to be more of a personal friend than family member.
Henry and Christina Maier are buried in the Lodi Memorial Cemeteri, San Joaquin County, CA.http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=ma...
Also buried in this cemetery:
Jacob Maier 1877-1942
Almore C. Maier, 1921-1942
Rosina Maier, 1877 to 1942
---The Fresno Bee Republican, dated March 30, 1942,
Lodi Man, Son Killed In Auto Truck Collision... Jacob Maier, 65, and his son, Almore, 21, of Lodi, were killed...in a collison of their automobile and a lumber truck...Three are unconscious... Mrs. Jacob Maier, wife of the driver; Mrs. Anna Krause, and a little girl, "Thelma Mae."
---I don't know if the Jacob Maier family was related.
The Lodi Cemetery is located at 5750 E. Pine Street, Lodi, CA 95240, telephone: 209-333-7171. They "might" have a record of the family. It "might" have the name of the funeral home. While the funeral home may have been sold, gone out of business, "sometimes" the records transfer. I would not expect this in this case, but it is possible.
I find a family tree showing a Wilhemina Pfaff, born 17 oct 1824, daughter of Karl Wilhelm Pfaff and Katharina Becker, siblings Heinrich 1826; Jakob 1828; Karl 1839; and Franz 1832. No spouse or children identified.