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John Mayer — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Alameda, California
Our Model Tree links this John Mayer across the 1910 and 1920 US Censuses in Alameda, California (XGBoost, ~Confirmed) — first a son (b.~1899), then head of a 8-person household.
Age 21
b. ~1899
Male
Son
Born: California
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Alameda, California |
| Surname | Mayer |
| Given Name | John J. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Additional Details | |
| Occupation | draftsman |
| Industry | ship yard |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Draftsman |
| Township / Ward | Oakland City |
| Est. Birth Year | ~1899 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
8 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Helen Mayer | Daughter | — | 14 | ~1906 |
| John Mayer | Head | — | 52 | ~1868 |
| Margaret Virden | Other | — | 80 | ~1840 |
| Richard Mayer | Son | — | 16 | ~1904 |
| Milton Mayer | Son | — | 12 | ~1908 |
| Thomas Mayer | Son | — | 23 | ~1897 |
| John Mayer | Son | — | 21 | ~1899 |
| Nellie Mayer | Spouse | — | 45 | ~1875 |
Census Appearances
1910
Alameda, California
Son, age 12
Alameda, California · implied b. ~1898 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mayer |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | none |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
Alameda, California
Son, age 21
Alameda, California · implied b. ~1899 — 8 household members
| Surname | Mayer |
| Given Name | John J. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | draftsman |
| Industry | ship yard |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links John Mayer across 2 US Census years (1910 and 1920) in Alameda, California, using XGBoost record linkage.
Show:
This person
Anchor record
John Mayer
Son · 1920 · age 21 · b. ~1899 · California
★ You are viewing this record
Sibling
Thomas Mayer
Sibling · 1920 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Mayer
Sibling · 1920 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Mayer
Sibling · 1920 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Milton Mayer
Sibling · 1920 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Alameda, California
Open full size
1920 US Federal Census — Alameda, California
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu090unit:0762)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Beatrice Perry | 5 | daughter | None | California |
| 52 | George P. Anderson | 31 | head | Carpenter | Denmark |
| 53 | Emile Anderson | 30 | wife | None | Denmark |
| 54 | Althea E. Anderson | 8 | daughter | None | California |
| 55 | Robert H. Anderson | 6 | son | None | California |
| 56 | Tony A. Sousa | 27 | head | Engineer | Hawaii |
| 57 | Mary A. Sousa | 23 | wife | None | Hawaii |
| 58 | Alfred H. Sousa | 3 | son | None | California |
| 59 | John J. Cosma | 47 | head | Pipe Fitter | Portugal |
| 60 | Mary P. Cosma | 43 | wife | None | Portugal |
| 61 | Mildred Cosma | 19 | daughter | Collar Maker | Hawaii |
| 62 | Georgina M. Cosma | 15 | daughter | None | Hawaii |
| 63 | Frank J. Cosma | 12 | son | None | California |
| 64 | Jesse J. Cosma | 10 | son | None | California |
| 65 | Bell S. Cosma | 8 | daughter | None | California |
| 66 | Alice M. Cosma | 6 | daughter | None | California |
| 67 | Joseph Guido | 52 | head | Foreman | Portugal |
| 68 | Abigail Guido | 40 | wife | None | Portugal |
| 69 | Selina Guido | 23 | daughter | None | California |
| 70 | Joseph Guido | 21 | son | Driver | California |
| 71 | Frank Guido | 18 | son | Driver | California |
| 72 | Henry Guido | 9 | son | None | California |
| 73 | Marguerite Guido | 11 | daughter | None | California |
| 74 | Philip Pfeiffer | 81 | head | None | Germany |
| 75 | Mary S. Schroder | 50 | daughter | None | New York |
| 76 | Marjory A. Schroder | 13 | daughter | None | California |
| 77 | George W. Richardson | 36 | head | Erector | Canada |
| 78 | Margaret Richardson | 37 | wife | None | Canada |
| 79 | Ralph W. Richardson | 13 | son | None | Canada |
| 80 | George W. Richardson | 9 | son | None | Canada |
| 81 | Helen L. Richardson | 4 | daughter | None | California |
| 82 | John J. Sr. Mayer | 52 | head | None | California |
| 83 | Nellie V. Mayer | 45 | wife | None | California |
| 84 | Thomas A. Mayer | 23 | son | Bookkeeper | California |
| 85 | John J. Mayer THIS PERSON | 21 | son | Draftsman | California |
| 86 | Richard S. Mayer | 16 | son | None | California |
| 87 | Helen V. Mayer | 14 | daughter | None | California |
| 88 | Milton F. Mayer | 12 | son | None | California |
| 89 | Margaret Virden | 80 | mother-in-law | None | Ireland |
| 90 | Richard Bibby | 69 | head | None | England |
| 91 | Fanny Bibby | 65 | wife | None | England |
| 92 | Joseph Dame | 70 | head | Confectionery | New York |
| 93 | Abbie E. Dame | 58 | wife | None | Oregon |
| 94 | Frank W. Dame | 33 | son | Candymaker | Oregon |
| 95 | Edward E. Johnson | 38 | head | Manager | Tennessee |
| 96 | Daisy L. Johnson | 26 | wife | None | California |
| 97 | Edmund Voltaire | 5 | stepson | None | California |
| 98 | Edward Heitman | 41 | head | Manager | Missouri |
| 99 | Rae Heitman | 35 | wife | None | California |
| 100 | Lucinda B. Heitman | 11 | daughter | None | California |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)