MC
Mary Chase — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Alameda, California
Our Model Tree links this Mary Chase across the 1920, 1930 and 1940 US Censuses in Alameda, California (XGBoost, ~Confirmed) — first a head (b.~1891), then head of a 5-person household.
Age 29
b. ~1891
Female
Head
Born: California
Widowed
1920 Census Record Details
| Census Year | 1920 |
| Location | Alameda, California |
| Surname | Chase |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Widowed |
| Birthplace | California |
| Father's Birthplace | Germany |
| Mother's Birthplace | Switzerland |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Berkeley City |
| Est. Birth Year | ~1891 |
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 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Marion Chase | Daughter | — | 9 | ~1911 |
| Laura Birkhofer | Other | — | 17 | ~1903 |
| Mary Chase | Head | — | 29 | ~1891 |
| Franklin Chase | Son | — | 6 | ~1914 |
| John Chase | Son | — | 2 | ~1918 |
Census Appearances
1920
Alameda, California
Head, age 29
Alameda, California · implied b. ~1891 — 5 household members
| Surname | Chase |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Widowed |
| Birthplace | California |
| Father's Birthplace | Germany |
| Mother's Birthplace | Switzerland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Alameda, California
Other, age 39
Alameda, California · implied b. ~1891 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chase |
| Given Name | Mary C |
| Relationship to Head | Head-H |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Widowed |
| Birthplace | California |
| Age at First Marriage | 18 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Switzerland |
| Occupation | none |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 10,000 |
| Radio Set | R |
| Veteran | No |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Alameda-County, California
Head, age 49
Alameda-County, California · implied b. ~1891 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chase |
| Given Name | May |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Widowed |
| Birthplace | California |
| 1935 Residence (City) | Berkeley City |
| 1935 Residence (County) | Alameda |
| Industry | 495 |
| Highest Grade | H-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 Chase across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Chase
Head · 1920 · age 29 · b. ~1891 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Alameda, California
Open full size
1920 US Federal Census — Alameda, California
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu093unit:0296)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lemartin Torno | 41 | Head | Chemist | Sweden |
| 2 | Martha Torno | 29 | Wife | — | France |
| 3 | Edith Torno | 12 | Daughter | — | California |
| 4 | Dorothy Torno | 1 | Daughter | — | California |
| 5 | Elizabeth J. White | 50 | Head | — | California |
| 6 | Mabel J. White | 25 | Daughter | — | California |
| 7 | Fred R. Herrick | 66 | Head | — | Ohio |
| 8 | Ella B. Herrick | 61 | Wife | — | Minnesota |
| 9 | Marian E. Herrick | 20 | Daughter | — | Minnesota |
| 10 | Harry S. Grindell | 28 | Head | Freight Clerk | California |
| 11 | Vera Grindell | 22 | Wife | — | California |
| 12 | Alexander C. Wise | 50 | Head | Tailor | Austria-Hungary |
| 13 | Jennie Wise | 44 | Wife | Hemstitching | Austria-Hungary |
| 14 | Joseph A. Wise | 22 | Son | Teacher | New York |
| 15 | Rose G. Wise | 19 | Daughter | — | New York |
| 16 | James G. Wise | 17 | Son | — | New York |
| 17 | Noi S. Lepiney | 39 | Head | Chef | France |
| 18 | Angel Lepiney | 34 | Wife | — | France |
| 19 | Chas. W. Brainard | 32 | Head | Agent | California |
| 20 | Anna L. Brainard | 31 | Wife | — | New York |
| 21 | Sylvia L. Brainard | 0 | Daughter | — | California |
| 22 | Phoebe Dancer | 78 | Grandmother | — | England |
| 23 | Mary Chase THIS PERSON | 29 | Head | — | California |
| 24 | Marion I. Chase | 9 | Daughter | — | California |
| 25 | Franklin D. Chase | 6 | Son | — | California |
| 26 | John F. Chase | 2 | Son | — | California |
| 27 | Laura Birkhofer | 17 | Sister | — | California |
| 28 | Mary Harthop | 57 | Head | — | Illinois |
| 29 | Geo. H. Harthop | 30 | Son | Chauffeur | California |
| 30 | Walter Harthop | 25 | Son | Chauffeur | California |
| 31 | Geo. F. Harthop | 5 | Grand-Son | — | California |
| 32 | Mary P. Keating | 56 | Head | — | England |
| 33 | Kathleen M. Keating | 37 | Daughter | Librarian | England |
| 34 | Allan Betzner | 48 | Head | — | Canada |
| 35 | Lillian E. Betzner | 50 | Wife | — | Canada |
| 36 | Ruth A. Betzner | 17 | Daughter | — | California |
| 37 | Berta L. Warfield | 52 | Head | — | Ohio |
| 38 | Walter T. Warfield | 27 | Son | Steam-Fitter | Iowa |
| 39 | Mabel M. Warfield | 22 | Daughter | Stenographer | Iowa |
| 40 | Mabel E. Warfield | 28 | Daughter-in-law | — | Ohio |
| 41 | Frances A. Cole | 60 | Head | Teacher | Tennessee |
| 42 | Rowena Smith | 50 | Sister | Teacher | Tennessee |
| 43 | Frederick M. Essig | 26 | Head | Teacher | Oregon |
| 44 | Edna A. Essig | 27 | Wife | — | California |
| 45 | Kathryn L. Essig | 3 | Daughter | — | California |
| 46 | Martha F. Essig | 1 | Daughter | — | California |
| 47 | John E. Barton | 61 | Head | Electrician | England |
| 48 | Margaret J. Barton | 49 | Wife | — | California |
| 49 | Leo H. Barton | 26 | Son | Manager | California |
| 50 | Vincent A. Barton | 17 | Daughter | Secretary | California |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)