MJ
Mary John — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Los Angeles, California
Our Model Tree links this Mary John across the 1930 and 1940 US Censuses in Los Angeles, California (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 7-person household.
Age 13
b. ~1917
Female
Daughter
Born: California
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Los Angeles, California |
| Surname | John |
| Given Name | Mary M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Los Angeles City |
| Est. Birth Year | ~1917 |
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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary John | Daughter | — | 13 | ~1917 |
| John John | Head | — | 53 | ~1877 |
| Mary John | Daughter | — | 21 | ~1909 |
| Bernice John | Daughter | — | 15 | ~1915 |
| Aileen John | Daughter | — | 8 | ~1922 |
| Paul John | Son | — | 6 | ~1924 |
| Carrie John | Spouse | — | 45 | ~1885 |
Census Appearances
1930
Los Angeles, …
Daughter, age 13
Los Angeles, California · implied b. ~1917 — 7 household members
| Surname | John |
| Given Name | Mary M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Los-Angeles-County, California
Spouse, age 24
Los-Angeles-County, California · implied b. ~1916 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | John |
| Given Name | Marion |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | Ontario |
| 1935 Residence (County) | San Bernardino |
| Occupation | Helper |
| Industry | School |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 600 |
| Highest Grade | Hs 3 |
| 1935 Residence | California |
| 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 Mary John across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary John
Daughter · 1930 · age 13 · b. ~1917 · California
★ You are viewing this record
Sibling
Paul John
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Aileen John
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice John
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary John
Sibling · 1930 · age 21
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
1930 US Federal Census — Los Angeles, California
Open full size
1930 US Federal Census — Los Angeles, California
Page Contents
50 people indexed on this census page (ia:1930:californiacensus00reel132:0449)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Hazel M Hock | 20 | Daughter | Secretary | Oregon |
| 52 | Lois Hock | 18 | Daughter | Comptometer | Oregon |
| 53 | Mell E Smith | 68 | Head | Partner | Ohio |
| 54 | John M John | 53 | Head | Bookbinder | Missouri |
| 55 | Carrie John | 45 | Wife | None | Missouri |
| 56 | Mary John | 21 | Daughter | Saleslady | Missouri |
| 57 | Bernice John | 15 | Daughter | None | California |
| 58 | Mary M John THIS PERSON | 13 | Daughter | None | California |
| 59 | Aileen John | 8 | Daughter | None | California |
| 60 | Paul John | 6 | Son | None | California |
| 61 | Gertrude C Livingston | 34 | Head | Stenographer | Ohio |
| 62 | Jeanette R Livingston | 15 | Daughter | None | New Mexico |
| 63 | Robert Livingston | 10 | Son | None | New Mexico |
| 64 | Carol Livingston | 7 | Daughter | None | New Mexico |
| 65 | Reginald Gregory | 27 | Head | Upholsterer | England |
| 66 | Petronella Gregory | 24 | Wife | None | Holland |
| 67 | Doris M Gregory | 5 | Daughter | None | Illinois |
| 68 | Hazel Gregory | 2 | Daughter | None | California |
| 69 | Edwin B Martin | 52 | Head | Carpenter | California |
| 70 | Meta F Martin | 51 | Wife | Hemstitcher | Missouri |
| 71 | Ina M Martin | 15 | Daughter | None | California |
| 72 | — | None | — | — | — |
| 73 | Marie Luttbrand | 72 | Head | None | Germany |
| 74 | Martin Luttbrand | 45 | Son | Salesman | Germany |
| 75 | Walter V Thompson | 37 | Head | Foreman | Illinois |
| 76 | Grace Thompson | 27 | Wife | None | Kansas |
| 77 | Louis A Griffin | 37 | Head | Passenger Agent | Colorado |
| 78 | Lillian Griffin | 45 | Wife | None | Tennessee |
| 79 | Annie E Miner | 71 | Head | None | New Jersey |
| 80 | Ernest V Miner | 35 | Son | Repairer & Adjuster | New York |
| 81 | Mary E Snyder | 58 | Head of family | Practical Nurse | North Carolina |
| 82 | James Thomas | 44 | Head | Salesman | Arizona |
| 83 | Julia M Thomas | 11 | Daughter | Board Marker | California |
| 84 | Marion G Thomas | 9 | Daughter | Messenger | California |
| 85 | James Martin | 19 | Boarder's son | Salesman | Texas |
| 86 | James Martin | 47 | Boarder | Musician | California |
| 87 | Ormond R Slocum | 35 | Head | Bookkeeper | Iowa |
| 88 | Leona P Slocum | 31 | Wife | None | Canada-English |
| 89 | Lewis H Slocum | 77 | Father | None | New York |
| 90 | Edna Sains | 30 | Head | Clerk | West Virginia |
| 91 | Abraham Klass | 38 | Head | Proprietor | Russia |
| 92 | Rose Klass | 15 | Daughter | None | Illinois |
| 93 | Jay Benson | 23 | Head | Salesman | Minnesota |
| 94 | Gertrude Benson | 20 | Wife | Waitress | Minnesota |
| 95 | Chauncey W Crim | 28 | Head | Waiter | Tennessee |
| 96 | John Munns | 22 | Partner | Waiter | United States |
| 97 | Eustus C Mason | 27 | Partner | Upholsterer | North Carolina |
| 98 | Claude C Miller | 38 | Head | Collector | Illinois |
| 99 | Barbara E Miller | 29 | Wife | Caretaker | California |
| 100 | George Carr | 13 | Stepson | None | California |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)