ML
Mary Lee — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this Mary Lee across the 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed), with identified parents Ah & Julia — first a daughter (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Lee |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco City |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Occupation | Secretary |
| Industry | Hardware Mfg Co |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1300 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Secretary |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1915 |
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 |
|---|---|---|---|---|
| Mary Lee | Daughter | — | 25 | ~1915 |
| Julia Lee | Head | — | 61 | ~1879 |
| Irving Lee | Son | — | 33 | ~1907 |
Census Appearances
1920
San Francisco, …
Daughter, age 1
San Francisco, California · implied b. ~1919 — 15 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lee |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Chinese |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | China |
| Mother's Birthplace | China |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Mother Tongue | Chinese |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Daughter, age 12
San Francisco, California · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lee |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Chinese |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | China |
| Mother's Birthplace | China |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Daughter, age 25
San-Francisco-County, California · implied b. ~1915 — 3 household members
| Surname | Lee |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco City |
| 1935 Residence (County) | San Francisco |
| Occupation | Secretary |
| Industry | Hardware Mfg Co |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1300 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| 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 Lee across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Ah Lee (~0.92 confidence) and mother Julia Lee (~0.92 confidence) and father Gink Tom (~0.92 confidence) and mother Dong Tong (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Ah Lee
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Julia Lee
b. ~1879
Source mother
● Household
· direct · ~0.92
Father
Gink Tom
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Dong Tong
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Lee
Daughter · 1940 · age 25 · b. ~1915 · California
★ You are viewing this record
Sibling
Irving Lee
Sibling · 1940 · age 33
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
1940 US Federal Census — San-Francisco-County, California
Open full size
1940 US Federal Census — San-Francisco-County, California
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00320-00657)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Gloria Salvo | 9 | daughter | — | California |
| 2 | Regina Salvo | 7 | daughter | — | California |
| 3 | Elena Salvo | 5 | daughter | — | California |
| 4 | Geraldine Salvo | 4 | daughter | — | California |
| 5 | Robert Salvo | 1 | son | — | California |
| 6 | Leo Tomasky | 42 | Head | Salesman | California |
| 7 | Stella Tomasky | 47 | wife | — | Poland |
| 8 | Ellis Tomasky | 17 | son | — | California |
| 9 | Bernice Tomasky | 13 | daughter | — | California |
| 10 | Leon Samuels | 66 | Head | Salesman | California |
| 11 | Bertha Samuels | 75 | sister | — | California |
| 12 | Jennie Samuels | 70 | sister | — | California |
| 13 | Mark Samuels | 56 | Brother | Salesman | California |
| 14 | Annette Schubener | 68 | Sister | — | California |
| 15 | Myrtle Renard | 52 | Sister | — | California |
| 16 | Nelita Bercovich | 55 | Head | — | Wisconsin |
| 17 | Beverly Bercovich | 27 | Daughter | Office Nurse | California |
| 18 | William Bercovich | 26 | Son | Clean Salesman | California |
| 19 | Nelda Bercovich | 23 | Daughter | Saleswoman | California |
| 21 | Peter Badian | 75 | Head | Laborer | Armenia |
| 22 | Annie Badian | 57 | Wife | — | Armenia |
| 23 | Leo Badian | 35 | Son | Owner | Illinois |
| 24 | Harry Badian | 33 | Son | Mechanic | Illinois |
| 25 | Alfred Hurlbeck | 70 | Head | — | Switzerland |
| 26 | Carry Hurlbeck | 69 | Wife | — | Germany |
| 27 | Doris Hurlbeck | 30 | daughter | Stenographer | California |
| 28 | Julia Lee | 61 | Head | — | California |
| 29 | Irving Lee | 33 | Son | Clerk | California |
| 30 | Mary Lee THIS PERSON | 25 | Daughter | Secretary | California |
| 31 | Fred W. Good | 30 | Head | Traffic Manager | California |
| 32 | Vera G. Good | 33 | Wife | — | Canada |
| 33 | William M. Thick | 41 | Head | Clerk | California |
| 34 | Kathryn Thick | 31 | Wife | — | California |
| 35 | Margaret M. Thick | 5 | daughter | — | California |
| 36 | Joseph Wormser | 51 | Head | Heating Contractor | Germany |
| 37 | Joseph Wormser | 20 | Son | — | Montana |
| 38 | Herbert Wormser | 19 | Son | — | Montana |
| 39 | Bessie Bigley | 49 | Housekeeper | Housekeeper | Nova Scotia |
| 40 | Guiseppie Pisani | 59 | Head | Salesman | Italy |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)