MG
Mary Grant — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Mendocino, California
Our Model Tree links this Mary Grant across the 1920 and 1930 US Censuses in Mendocino, California (XGBoost, ~Confirmed) — first a daughter (b.~1918), then head of a 15-person household.
Age 12
b. ~1918
Female
Daughter
Born: California
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Mendocino, California |
| Surname | Grant |
| Given Name | Mary K. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Australia |
| Mother's Birthplace | California |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Arena Township |
| Est. Birth Year | ~1918 |
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.
15 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mabel Grant | Daughter | — | 11 | ~1919 |
| Agnes Grant | Daughter | — | 1 | ~1929 |
| Melba Grant | Daughter | — | 6 | ~1924 |
| Mary Grant | Daughter | — | 12 | ~1918 |
| Beatrice Grant | Daughter | — | 14 | ~1916 |
| Bessie Grant | Daughter | — | 9 | ~1921 |
| Alice Grant | Daughter | — | 18 | ~1912 |
| Sylvia Grant | Daughter | — | 19 | ~1911 |
| Edwin Grant | Head | — | 50 | ~1880 |
| Arthur Grant | Son | — | 8 | ~1922 |
| Russell Grant | Son | — | 2 | ~1928 |
| Malcolm Grant | Son | — | 17 | ~1913 |
| Arnold Grant | Son | — | 4 | ~1926 |
| James Grant | Son | — | 16 | ~1914 |
| Mary Grant | Spouse | — | 41 | ~1889 |
Census Appearances
1920
Mendocino, California
Daughter, age 2
Mendocino, California · implied b. ~1918 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grant |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Australia |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Mendocino, California
Daughter, age 12
Mendocino, California · implied b. ~1918 — 15 household members
| Surname | Grant |
| Given Name | Mary K. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Australia |
| Mother's Birthplace | California |
| Occupation | none |
| Can Read/Write | 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 Mary Grant across 2 US Census years (1920 and 1930) in Mendocino, California, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Grant
Daughter · 1930 · age 12 · b. ~1918 · California
★ You are viewing this record
Sibling
James Grant
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arthur Grant
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Grant
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Melba Grant
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mabel Grant
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Russell Grant
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Beatrice Grant
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Malcolm Grant
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sylvia Grant
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bessie Grant
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Grant
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arnold Grant
Sibling · 1930 · age 4
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 — Mendocino, California
Open full size
1930 US Federal Census — Mendocino, California
Page Contents
50 people indexed on this census page (ia:1930:californiacensus00reel177:0715)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Kate Dorr | 44 | Head | Housewife | New York |
| 52 | Harry Dorr | 19 | Son | Laborer | California |
| 53 | Etta May Dorr | 17 | Daughter | None | California |
| 54 | Arthur Comegys | 55 | Head | Farmer | California |
| 55 | Ethel Comegys | 54 | Wife | None | California |
| 56 | Thelma Comegys | 18 | Daughter | None | California |
| 57 | Susan Talbot | 74 | Mother-in-law | None | California |
| 58 | Beech Aurnbourn | 69 | Head | Laborer | California |
| 59 | Edwin A. Grant | 50 | Head | Farmer | Australia |
| 60 | Mary Grant | 41 | Wife | None | California |
| 61 | Sylvia J. Grant | 19 | Daughter | Teacher | California |
| 62 | Alice J. Grant | 18 | Daughter | None | California |
| 63 | Malcolm D. Grant | 17 | Son | Milker | California |
| 64 | James F. Grant | 16 | Son | Milker | California |
| 65 | Beatrice E. Grant | 14 | Daughter | None | California |
| 66 | Mary K. Grant THIS PERSON | 12 | Daughter | None | California |
| 67 | Mabel E. Grant | 11 | Daughter | None | California |
| 68 | Bessie M. Grant | 9 | Daughter | None | California |
| 69 | Arthur T. Grant | 8 | Son | None | California |
| 70 | Melba J. Grant | 6 | Daughter | None | California |
| 71 | Arnold E. Grant | 4 | Son | None | California |
| 72 | Russell L. Grant | 2 | Son | None | California |
| 73 | Agnes R. Grant | 1 | Daughter | None | California |
| 74 | Dario Zanucchi | 26 | Head | Farmer | California |
| 75 | Dora Zanucchi | 50 | Mother | None | Italy |
| 76 | Heido W. Reiser | 40 | Head | Farmer | Germany |
| 77 | Roselia M. Reiser | 46 | Wife | None | England |
| 78 | Herman Johnson | 63 | Head | Farmer | Sweden |
| 79 | Caroline Johnson | 38 | Wife | None | Norway |
| 80 | Sydney Johnson | 21 | Son | Truck Driver | California |
| 81 | Arthur Johnson | 35 | Head | Woods Man | California |
| 82 | Maud Johnson | 27 | Wife | None | California |
| 83 | Tom Johnson | 8 | Son | None | California |
| 84 | Verna Johnson | 7 | Daughter | None | California |
| 85 | Billie Johnson | 5 | Son | None | California |
| 86 | Jesse M. Holcomb | 74 | Head | Laborer | Vermont |
| 87 | Frank Wilhelm | 72 | Hired man | Laborer | Pennsylvania |
| 88 | Walter Eckert | 65 | Head | Tailor | New York |
| 89 | Cristine Eckert | 50 | Wife | None | England |
| 90 | Richard H. Grant | 49 | Head | Carpenter | Minnesota |
| 91 | Jennie D. Grant | 78 | Mother | None | England |
| 92 | William H. Smith | 62 | Head | Farmer | New York |
| 93 | Bertha Smith | 55 | Wife | None | Sweden |
| 94 | George Mason | 50 | O | Farmer | Pennsylvania |
| 95 | Mollie Mason | 46 | Wife | None | Pennsylvania |
| 96 | Russell Mason | 23 | Son | Laborer | California |
| 97 | Walter Mason | 20 | Son | Laborer | California |
| 98 | Olive Mason | 18 | Daughter | None | California |
| 99 | Darrell Mason | 15 | Son | None | California |
| 100 | Oliver Mason | 13 | Son | None | California |
Related Census Records
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)