ML
Mary Lawrence — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mendocino-County, California
Our Model Tree links this Mary Lawrence across the 1920, 1930 and 1940 US Censuses in Mendocino-County, California (XGBoost, ~Confirmed), with identified parents A & Antone — first a daughter (b.~1907), then head of a 5-person household.
Age 33
b. ~1907
Female
Daughter
Born: Hawaii
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mendocino-County, California |
| Surname | Lawrence |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Hawaii |
| 1935 Residence (City) | Fort Bragg |
| 1935 Residence (County) | Mendocino |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | servant |
| Industry | private homes |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 400 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Hawaii |
| Birth Country | United States |
| Birthplace (normalized) | hawaii |
| Occupation | Servant |
| Township / Ward | Fort Bragg |
| Est. Birth Year | ~1907 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Lawrence | Daughter | — | 33 | ~1907 |
| Louis Lawrence | Son | — | 28 | ~1912 |
| Frank Lawrence | Son | — | 22 | ~1918 |
| Fred Lawrence | Son | — | 27 | ~1913 |
| Mary Lawrence | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Mendocino, California
Daughter, age 12
Mendocino, California · implied b. ~1908 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lawrence |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Hawaii |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Hawaii |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Hawaii |
| Birth Country | United States |
| Birthplace (normalized) | hawaii |
1930
Mendocino, California
Daughter, age 22
Mendocino, California · implied b. ~1908 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lawrence |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Hawaii |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Hawaii |
| Occupation | House Maid |
| Industry | Private Family |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Hawaii |
| Birth Country | United States |
| Birthplace (normalized) | hawaii |
1940
Mendocino-County, California
Daughter, age 33
Mendocino-County, California · implied b. ~1907 — 5 household members
| Surname | Lawrence |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Hawaii |
| 1935 Residence (City) | Fort Bragg |
| 1935 Residence (County) | Mendocino |
| Naturalization Status | Naturalized |
| Occupation | servant |
| Industry | private homes |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 400 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Hawaii |
| Birth Country | United States |
| Birthplace (normalized) | hawaii |
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 Lawrence across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father A Lawrence (~0.92 confidence) and father Antone Lawrence (~0.92 confidence) and mother Nancy Lawrence (~0.92 confidence) and mother Mary Lawrence (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
A Lawrence
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Antone Lawrence
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Nancy Lawrence
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Mary Lawrence
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Lawrence
Daughter · 1940 · age 33 · b. ~1907 · California
★ You are viewing this record
Sibling
Louis Lawrence
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Lawrence
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fred Lawrence
Sibling · 1940 · age 27
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 — Mendocino-County, California
Open full size
1940 US Federal Census — Mendocino-County, California
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00263-00400)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Lawrence | 52 | wife | — | Hawaii |
| 42 | Mary Lawrence THIS PERSON | 33 | daughter | Servant | Hawaii |
| 43 | Louis Lawrence | 28 | son | Laborer | Hawaii |
| 44 | Fred Lawrence | 27 | son | Laborer | Hawaii |
| 45 | Frank Lawrence | 22 | son | Laborer | California |
| 46 | William Barkley | 69 | head | — | New Hampshire |
| 47 | Stella Barkley | 66 | wife | — | Missouri |
| 48 | Jack Barkley | 26 | son | — | California |
| 49 | William J. Starr | 23 | head | Monotype Operator | Massachusetts |
| 50 | Alma Starr | 21 | wife | Dental Assistant | California |
| 51 | Frank Fernandez | 53 | head | Laborer | Portugal |
| 52 | Mary Fernandez | 58 | wife | — | Azores |
| 53 | Tony Fernandez | 20 | son | Janitor'S Helper | California |
| 54 | Callie Fernandez | 16 | daughter | — | California |
| 55 | Alice Andresen | 63 | head | — | California |
| 56 | Henrietta Andresen | 37 | daughter | Operator | California |
| 57 | Andrew Christofferson | 54 | head | Blacksmith | Michigan |
| 58 | Minnie Christofferson | 65 | wife | — | Ohio |
| 60 | Albert Marsman | 40 | head | Manager | France |
| 61 | Lucille Marsman | 36 | wife | — | California |
| 62 | Ray E. Roach | 33 | head | Truck Driver | California |
| 63 | Roberta Roach | 24 | wife | — | California |
| 64 | Frans Ilmari Auvari | 51 | head | Proprietor | Finland |
| 65 | Amelia Auvari | 45 | wife | — | Finland |
| 66 | Oscar Alfaro | 46 | head | Housework | Mexico |
| 67 | William Alfaro | 18 | son | Waiter | California |
| 68 | Rudolfo Alfaro | 16 | son | Waiter | California |
| 69 | Cindlaria Alfaro | 21 | daughter | — | Arizona |
| 70 | Karl Wirtanen | 52 | head | Carpenter | Finland |
| 71 | Helga Wirtanen | 52 | wife | — | Finland |
| 72 | Dayton Barrence | 38 | head | Woodsman | California |
| 73 | Ernestine Barrence | 23 | wife | — | California |
| 74 | Dayton Edward Barrence | 2 | son | — | California |
| 75 | Pete Trevisuoci | 36 | head | Waiter | Italy |
| 76 | Bruna Trevisuoci | 18 | daughter | — | California |
| 77 | Albert Trevisuoci | 16 | son | Delivery Boy | California |
| 78 | James Cendreani | 27 | head | Clerk | California |
| 79 | Ruby Cendreani | 22 | wife | — | California |
| 80 | Adrienne Cendreani | 1 | daughter | — | California |
Related Census Records
Pedigree Summary
Mary + 3 siblings
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)