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Mary Luce — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Alameda-County, California
Our Model Tree links this Mary Luce across the 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed) — first a daughter (b.~1919), then head of a 3-person household.
Age 21
b. ~1919
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Alameda-County, California |
| Surname | Luce |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Berkeley |
| 1935 Residence (County) | Alameda |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | C 2 |
| 1935 Residence | Same House |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Berkeley |
| Est. Birth Year | ~1919 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Ethel Luce | Spouse | — | 52 | ~1888 |
| Mary Luce | Daughter | — | 21 | ~1919 |
| Hughbert Luce | Head | — | 53 | ~1887 |
Census Appearances
1930
Alameda, California
Daughter, age 11
Alameda, California · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Luce |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Alameda-County, California
Daughter, age 21
Alameda-County, California · implied b. ~1919 — 3 household members
| Surname | Luce |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Berkeley |
| 1935 Residence (County) | Alameda |
| Income (1939) | 0 |
| Highest Grade | C 2 |
| 1935 Residence | Same House |
| 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 Luce across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Luce
Daughter · 1940 · age 21 · b. ~1919 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Alameda-County, California
Open full size
1940 US Federal Census — Alameda-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00189-00064)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Sara Lindsey | 70 | Mother-in-law | — | Tennessee |
| 42 | Donald H Groves | 43 | Head | Letter Carrier | California |
| 43 | Leah T Groves | 43 | Wife | Stenographer | California |
| 44 | Donald H Jr Groves | 19 | Son | Rod Man | California |
| 45 | Rod Roger Cummings | 38 | Head | Missionary | Burma |
| 46 | Beryl Cummings | 41 | Wife | — | New York |
| 47 | Roger Wesley Cummings | 6 | Son | — | Burma |
| 48 | John Roberto Cummings | 4 | Son | — | Burma |
| 49 | Frank Edward Cummings | 0 | Son | — | California |
| 50 | Albert Barbrack | 43 | Head | Newspapermaker | California |
| 51 | Mary Louise Barbrack | 40 | Wife | — | Illinois |
| 52 | Richard Barbrack | 13 | Son | — | California |
| 53 | Stanley A Hirtle | 28 | Head | Police Officer | California |
| 54 | Rose H Coombs | 59 | Mother | — | California |
| 55 | Herman G Bellarius | 34 | Head | Accountant | California |
| 56 | Florence Bellarius | 26 | Wife | Knitting Instructor | California |
| 57 | Richard Bellarius | 2 | Son | — | California |
| 58 | William A Cook | 37 | Head | Mister-Owner & Repair | Nebraska |
| 59 | Isabelle Cook | 25 | Wife | — | Iowa |
| 60 | William W Campbell | 32 | Head | Research Assistant | California |
| 61 | Katherine Campbell | 30 | Wife | — | Washington |
| 62 | John W Campbell | 3 | Son | — | California |
| 63 | Peter D Campbell | 0 | Son | — | California |
| 64 | Mabel Landahl | 48 | Head | Billing Clerk | Iowa |
| 65 | John B Wilkes | 24 | Head | Chemist | California |
| 66 | Eunice B Wilkes | 23 | Wife | — | Montana |
| 67 | Asa R Warren | 56 | Head | Lineman | California |
| 68 | Maud R Warren | 56 | Wife | — | Maine |
| 69 | Waldo S Watson | 27 | Head | Dept. Manager | California |
| 70 | Elizabeth Watson | 59 | Mother | Sales Asst Worker | California |
| 71 | Marjorie Wilson | 43 | Head | Teaching | California |
| 72 | Geraldine B Wilson | 13 | Daughter | — | California |
| 73 | Thomas C Mclaughlin | 27 | Head | Salesman | California |
| 74 | Roberta M Mclaughlin | 28 | Wife | — | California |
| 75 | Michael T Mclaughlin | 3 | Son | — | California |
| 76 | Hughbert S Luce | 53 | Head | Clerical | California |
| 77 | Ethel C Luce | 52 | Wife | — | California |
| 78 | Mary L Luce THIS PERSON | 21 | Daughter | — | California |
| 79 | Myrtle White | 53 | Head | Clk | California |
| 80 | Ollie C Lamb | 58 | Head | Educational Clk | Kansas |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)