Mary Andrews — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Alameda-County, California

Our Model Tree links this Mary Andrews across the 1920, 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 3-person household.

Age 70 b. ~1870 Female Head Born: California Widowed

1940 Census Record Details

Census Year	1940
Location	Alameda-County, California
Surname	Andrews
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	70
Marital Status	Widowed
Birthplace	California
1935 Residence (City)	Oakland City
1935 Residence (County)	Alameda
Additional Details
Highest Grade	Hs 1
1935 Residence	Same place
Birth State	California
Birth Country	United States
Birthplace (normalized)	california
Township / Ward	Oakland City
Est. Birth Year	~1870

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
Marie Andrews	Daughter	—	37	~1903
Mary Andrews	Head	—	70	~1870
Lester Andrews	Son	—	43	~1897

Census Appearances

1920

Alameda, California

Spouse, age 47

Alameda, California · implied b. ~1873 — 7 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Andrews
Given Name	Mary F
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	47
Marital Status	Married
Birthplace	California
Father's Birthplace	Portugal
Mother's Birthplace	Portugal
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	California
Birth Country	United States
Birthplace (normalized)	california

1930

Alameda, California

Spouse, age 58

Alameda, California · implied b. ~1872 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Andrews
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	58
Marital Status	Married
Birthplace	California
Age at First Marriage	18
Father's Birthplace	Massachusetts
Mother's Birthplace	California
Can Read/Write	Yes
Birth State	California
Birth Country	United States
Birthplace (normalized)	california

1940

Alameda-County, California

Head, age 70

Alameda-County, California · implied b. ~1870 — 3 household members

Surname	Andrews
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	70
Marital Status	Widowed
Birthplace	California
1935 Residence (City)	Oakland City
1935 Residence (County)	Alameda
Highest Grade	Hs 1
1935 Residence	Same place
Birth State	California
Birth Country	United States
Birthplace (normalized)	california

Model Tree

Linked across censuses

Our Model Tree links Mary Andrews 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 Andrews

Head · 1940 · age 70 · b. ~1870 · 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

Page Contents

38 people indexed on this census page (nara:1940:m-t0627-00434-00451)

Line	Name	Age	Relation	Occupation	Birthplace
1	Nikolina Marimich	61	Wife	—	Austria
2	Louis Bispo	29	Son-in-law	Helper	California
3	Catherine Bispo	27	Daughter	Mangler	New York
4	Rose Marie Jurkovich	9	Granddaughter	—	California
5	Joseph W. Bell	33	Head	Dispatcher	Northern Ireland
6	Margaret Bell	29	Wife	Teacher	Michigan
7	Roberta Jane Bell	1	Daughter	—	California
8	Joaquim Baptista	66	Head	Watchman	Azores Island
9	Ruby Baptista	56	Wife	—	Azores Island
10	Joseph Baptista	20	Son	Artist	California
11	Thomas Baptista	16	Son	—	California
13	Frank Serpa	38	Head	Mechanic	Azores Island
14	Anna Serpa	26	Wife	Manager	Rhode Island
15	Anna M. Pimentel	56	Mother-in-law	—	Rhode Island
16	Chas Ungaretti	60	Head	Builder	Italy
17	Mary Ungaretti	54	Wife	—	California
18	Gino Ungaretti	36	Son	Builder	California
19	Levia Ungaretti	30	Daughter-in-law	—	California
20	Alma Ungaretti	7	Granddaughter	—	California
21	Gene Ungaretti	5	Grandson	—	California
22	Adolph Ungaretti	44	Brother	Laborer	Italy
23	Jose Affonso	54	Head	Clerk	Portugal
24	Clelia Affonso	44	Wife	—	Portugal
25	Ernest Affonso	17	Son	Planting	California
26	Albert Affonso	14	Son	—	California
27	Jose S. Pimentel	78	Head	—	Azores Island
28	Maria Pimentel	70	Wife	—	Azores Island
29	Ernest Pimentel	35	Son	Clerking	Nevada
30	Alfred Pimentel	29	Son	Crane Operator	California
31	John Pimentel	26	Son	Fry Cook	California
33	Francis Mulhall	73	Head	Insurance	Missouri
34	Jose Rodrigues	64	Head	Cement Finisher	Madeira Island
35	Maria Rodrigues	64	Wife	—	Madeira Island
36	Mary Andrews THIS PERSON	70	Head	—	California
37	Lester Andrews	43	Son	Lumber Handler	California
38	Marie Andrews	37	Daughter	Rubber Worker	California
39	Quirin Chavez	73	Head	—	Mexico
40	Martin Chavez	40	Son	—	Mexico

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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)

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