RC
Robert Chapman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Mateo-County, California
Our Model Tree links this Robert Chapman across the 1930 and 1940 US Censuses in San-Mateo-County, California (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 23-person household.
Age 17
b. ~1923
Male
Son
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Mateo-County, California |
| Surname | Chapman |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Menlo Park |
| 1935 Residence (County) | San Mateo |
| Additional Details | |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | Menlo Park |
| Est. Birth Year | ~1923 |
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.
23 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Son Barker Gordon | Other | — | — | |
| Vera Strub | Spouse | — | 43 | ~1897 |
| Head Gallett Willard S | Other | — | — | |
| Ruth Anderson | Spouse | — | 47 | ~1893 |
| Harder Chapman | Son | — | 19 | ~1921 |
| Head Linderholm Harrison B | Other | — | — | |
| Head Strub Charles | Other | — | — | |
| Head Tupper Marvin G | Other | — | — | |
| Hattie Linderholm | Spouse | — | 50 | ~1890 |
| Elizabeth Strub | Other | — | 10 | ~1930 |
| Charles Anderson | Son | — | 12 | ~1928 |
| Darla Tupper | Daughter | — | 4 | ~1936 |
| Uvalda Tupper | Spouse | — | 20 | ~1920 |
| Aileen Gallett | Spouse | — | 46 | ~1894 |
| Mary Strub | Other | — | 19 | ~1921 |
| Son Lindstrom Godfrey | Other | — | — | |
| Robert Chapman | Son | — | 17 | ~1923 |
| George Chapman | Head | — | 53 | ~1887 |
| Christine Chapman | Spouse | — | 52 | ~1888 |
| Head Anderson Louis G | Other | — | — | |
| Daisy Chapman | Daughter | — | 22 | ~1918 |
| Virginia Strub | Other | — | 17 | ~1923 |
| Robert Strub | Son | — | 21 | ~1919 |
Census Appearances
1930
San Mateo, …
Son, age 7
San Mateo, California · implied b. ~1923 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | Robert U. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Nebraska |
| Mother's Birthplace | Denmark |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
San-Mateo-County, California
Son, age 17
San-Mateo-County, California · implied b. ~1923 — 23 household members
| Surname | Chapman |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Menlo Park |
| 1935 Residence (County) | San Mateo |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 Robert Chapman across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Chapman
Son · 1940 · age 17 · b. ~1923 · California
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Sibling
Darla Tupper
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Anderson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daisy Chapman
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Strub
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harder Chapman
Sibling · 1940 · age 19
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-Mateo-County, California
Open full size
1940 US Federal Census — San-Mateo-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00331-00151)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Harriett B. Rowan | 59 | Head | Weaver | California |
| 42 | James Mcgrath | 37 | Head | Clerk | Colorado |
| 43 | Olive Mcgrath | 36 | wife | — | California |
| 44 | James M. Mcgrath | 6 | son | — | California |
| 45 | Michele Mcgrath | 4 | daughter | — | California |
| 46 | Terry Mcgrath | 1 | son | — | California |
| 47 | Head Collar, I. Da | None | F | — | — |
| 48 | Alfred Newhouse | 39 | Head | Proprietor | Poland |
| 49 | Sonia Newhouse | 29 | wife | — | Poland |
| 50 | Phyllis Newhouse | 4 | daughter | — | California |
| 51 | David Newhouse | 1 | son | — | California |
| 52 | Clarence B. Wyman | 27 | Head | Truck Driver | California |
| 53 | Mary Wyman | 27 | wife | — | California |
| 54 | Dianne Wyman | 2 | daughter | — | California |
| 55 | Alphonse B. Seiller | 79 | Head | — | France |
| 56 | Leonie Seiller | 78 | wife | — | France |
| 57 | Roomer Ward, Roland C. | None | M | Gift Shop | — |
| 58 | George H. Chapman | 53 | Head | Carpenter | Nebraska |
| 59 | Christine Chapman | 52 | wife | — | Denmark |
| 60 | Daisy Chapman | 22 | daughter | Saleslady | Colorado |
| 61 | Harder Chapman | 19 | son | Apprentice Carpenter | Colorado |
| 62 | Robert Chapman THIS PERSON | 17 | son | — | Colorado |
| 63 | Head Anderson, Louis G. | None | M | Building | — |
| 64 | Ruth Anderson | 47 | wife | — | New York |
| 65 | Charles Anderson | 12 | son | — | California |
| 66 | Son Barker, Gordon | None | M | — | — |
| 67 | Head Tupper, Marvin G. | None | M | Fertilizer | — |
| 68 | Uvalda Tupper | 20 | wife | — | Texas |
| 69 | Darla Tupper | 4 | daughter | — | Oklahoma |
| 70 | Head Gallett, Willard S. | None | M | Wholesale Dried Fruit | — |
| 71 | Aileen Gallett | 46 | wife | — | California |
| 72 | Son Lindstrom, Godfrey | None | M | Ships | — |
| 73 | Head Linderholm, Harrison B. | None | M | Bldg & Const. | — |
| 74 | Hattie H. Linderholm | 50 | wife | — | Illinois |
| 75 | Head Strub, Charles | None | M | Horse Race Track | — |
| 76 | Vera Strub | 43 | wife | — | California |
| 77 | Robert Strub | 21 | son | — | California |
| 78 | Mary Louise Strub | 19 | Dau. | — | California |
| 79 | Virginia Strub | 17 | Dau. | — | California |
| 80 | Elizabeth Strub | 10 | Dau. | — | California |
Related Census Records
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)