MC
Mary Cook — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Los Angeles, California
Our Model Tree links this Mary Cook across the 1920, 1930 and 1940 US Censuses in Los Angeles, California (XGBoost, ~Confirmed) — first a head (b.~1882), then head of a 2-person household.
Age 48
b. ~1882
Female
Head
Born: Indiana
Widowed
1930 Census Record Details
| Census Year | 1930 |
| Location | Los Angeles, California |
| Surname | Cook |
| Given Name | Mary H. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Widowed |
| Birthplace | Indiana |
| Age at First Marriage | 23 |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Additional Details | |
| Occupation | Investigator |
| Industry | Superior Court |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 40 |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Investigator |
| Township / Ward | Los Angeles City |
| Est. Birth Year | ~1882 |
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.
2 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Cook | Head | — | 48 | ~1882 |
| Robert Cook | Son | — | 21 | ~1909 |
Census Appearances
1920
Los Angeles, …
Head, age 38
Los Angeles, California · implied b. ~1882 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooke |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Widowed |
| Birthplace | Indiana |
| Father's Birthplace | United States |
| Mother's Birthplace | United States |
| Occupation | Nurse |
| Industry | City |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Los Angeles, …
Head, age 48
Los Angeles, California · implied b. ~1882 — 2 household members
| Surname | Cook |
| Given Name | Mary H. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Widowed |
| Birthplace | Indiana |
| Age at First Marriage | 23 |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | Investigator |
| Industry | Superior Court |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 40 |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Los-Angeles-County, California
Other, age 59
Los-Angeles-County, California · implied b. ~1881 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooke |
| Given Name | Mary |
| Relationship to Head | Inmate |
| Sex | F |
| Color / Race | White |
| Age | 59 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Los Angeles City |
| 1935 Residence (County) | Los Angeles |
| Highest Grade | 1 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Cook across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Cook
Head · 1930 · age 48 · b. ~1882 · California
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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
48 people indexed on this census page (ia:1930:californiacensus00reel141:0654)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Anna Quinn | 57 | Head | — | Kansas |
| 52 | Rosemary Quinn | 21 | Daughter | — | Kansas |
| 53 | Elizabeth Quinn | 18 | Daughter | — | Kansas |
| 54 | Emmett Quinn | 25 | Son | Druggist | Kansas |
| 55 | L. Clay Johnson | 33 | Head | Salesman | Oklahoma |
| 56 | Florence Johnson | 37 | Wife | — | Arizona |
| 57 | Clifford Johnson | 13 | Son | — | Arizona |
| 58 | Mary H. Cook THIS PERSON | 48 | Head | Investigator | Indiana |
| 59 | Robert Cook | 21 | Son | Pharmacist | California |
| 62 | James S. Bean | 30 | Head | Salesman | Kansas |
| 63 | Stephen F. Kennedy | 42 | Head | Merchant | Wisconsin |
| 64 | Mabel Mae Kennedy | 40 | Wife | — | Missouri |
| 65 | Geraldine Kennedy | 11 | Daughter | — | California |
| 66 | George R. Grigs | 49 | Head | Painter | Illinois |
| 67 | Mary J. Grigs | 47 | Wife | — | Missouri |
| 68 | Leona Grigs | 18 | Daughter | — | Kansas |
| 69 | Carla B. Grigs | 16 | Daughter | — | Kansas |
| 70 | Fraser Arvey | 45 | Head | Doctor | Russia |
| 71 | Verna G. Arvey | 20 | Daughter | Pianist | California |
| 72 | Edna Lois Arvey | 15 | Daughter | — | California |
| 73 | Martin Dale Arvey | 10 | Son | — | California |
| 74 | John H. Forsythe | 34 | Head | Fitter | Pennsylvania |
| 75 | Elizabeth Forsythe | 36 | Wife | — | Maryland |
| 76 | John H. Jr. Forsythe | 3 | Son | — | Maryland |
| 77 | Benjamin F. Daniel | 38 | Head | Machinist | Pennsylvania |
| 78 | Bessie S. Daniel | 51 | Wife | — | New Jersey |
| 79 | Burr C. Mitchell | 41 | Head | Carpenter | Michigan |
| 80 | Cora Mitchell | 43 | Wife | — | Michigan |
| 81 | Ethel Mitchell | 14 | Daughter | — | California |
| 82 | Wallace Mitchell | 12 | Son | — | California |
| 83 | Calvin F. Gustavus | 46 | Head | Salesman | Texas |
| 84 | Betty Gustavus | 24 | Wife | — | England |
| 85 | Howard Gustavus | 4 | Son | — | New York |
| 86 | Albert F. Park | 66 | Head | Gardner | Germany |
| 87 | Augusta Park | 71 | Wife | — | Germany |
| 88 | Thomas H. Fawson | 42 | Head | — | England |
| 89 | Donald L. Fawson | 16 | Son | — | Canada |
| 90 | Vernon Fawson | 13 | Son | — | Canada |
| 91 | Farrell C. Diggs | 64 | Head | Pharmacist | Indiana |
| 92 | Grace Diggs | 61 | Wife | — | Illinois |
| 93 | Marcus D. Rittle | 72 | Head | Pharmacist | Indiana |
| 94 | Amanda E. Rittle | 69 | Wife | — | Illinois |
| 95 | Mary E. Collins | 51 | Head | Tailoress | Ohio |
| 96 | Cora E. Evans | 51 | Roomer | Tailoress | Ohio |
| 97 | Harry E. Colborn | 50 | Head | Fireman | California |
| 98 | Mabel L. Colborn | 51 | Wife | — | Illinois |
| 99 | Harry E. Jr. Colborn | 20 | Son | — | California |
| 100 | Frances Colborn | 15 | Daughter | — | 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)