RD
Robert Davidson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Robert Davidson across the 1920, 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1886), then head of a 5-person household.
Age 54
b. ~1886
Male
Head
Born: Connecticut
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Davidson |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Connecticut |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Phila. |
| Additional Details | |
| Occupation | Painter |
| Industry | WPA Project |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 742 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
| Occupation | Painter |
| Township / Ward | Philadelphia |
| Est. Birth Year | ~1886 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| William Davidson | Son | — | 20 | ~1920 |
| Mabel Davidson | Spouse | — | 53 | ~1887 |
| Robert Davidson | Head | — | 54 | ~1886 |
| Emily Davidson | Daughter | — | 14 | ~1926 |
| Robert Davidson | Son | — | 15 | ~1925 |
Census Appearances
1920
Philadelphia, Pennsylvania
Head, age 34
Philadelphia, Pennsylvania · implied b. ~1886 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Robert S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Connecticut |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Bolter up |
| Industry | Shipyard |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Connecticut |
| Birth Country | United States |
| Year of Naturalization | R |
| Birthplace (normalized) | connecticut |
1930
Philadelphia, Pennsylvania
Head, age 45
Philadelphia, Pennsylvania · implied b. ~1885 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Connecticut |
| Age at First Marriage | 30 |
| Father's Birthplace | Northern Ireland |
| Mother's Birthplace | Northern Ireland |
| Occupation | Upholsterer |
| Industry | At Home |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 15 |
| Veteran | No |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
1940
Philadelphia-County, Pennsylvania
Head, age 54
Philadelphia-County, Pennsylvania · implied b. ~1886 — 5 household members
| Surname | Davidson |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Connecticut |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Phila. |
| Occupation | Painter |
| Industry | WPA Project |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 742 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
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 Davidson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Davidson
Head · 1940 · age 54 · b. ~1886 · Pennsylvania
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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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03731-00370)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James Cowley | 19 | Head | Shipper | Penna |
| 42 | John Cowley | 15 | Son | — | Penna |
| 43 | Mary Cowley | 14 | Daughter | — | Penna |
| 44 | Charles Cowley | 26 | Son | Salesman | Penna |
| 45 | Monica Cowley | 22 | Daughter-in-law | — | Penna |
| 46 | Monica Cowley | 0 | Granddaughter | — | Penna |
| 47 | Mary Mcgowan | 45 | Head | — | Penna |
| 48 | June Mcgowan | 14 | Daughter | — | Penna |
| 49 | Mary Hockenbury | 37 | Head | Capper | Penna |
| 50 | Albert Kuehne | 56 | Head | Waiter | Germany |
| 51 | Louise Kuehne | 52 | Wife | — | Germany |
| 52 | Grace Cox | 60 | Head | Deaconess | Maryland |
| 53 | Edna Seldrich | 31 | Head | Stenographer | Penna |
| 54 | Richard Mullinaux | 55 | Head | Salesman | Penna |
| 55 | Cora Mullinaux | 58 | Wife | — | Penna |
| 56 | Richard Mullinaux | 24 | Son | Clerk | Penna |
| 57 | Robert Davidson THIS PERSON | 54 | Head | Painter | Connecticut |
| 58 | Mabel Davidson | 53 | Wife | — | Canada-English |
| 59 | William Davidson | 20 | Son | New Worker | Penna |
| 60 | Robert Davidson | 15 | Son | New Worker | Penna |
| 61 | Emily Davidson | 14 | Daughter | — | Penna |
| 62 | Charles Stein | 63 | Head | — | Penna |
| 63 | Jennie Stein | 57 | Wife | Seamstress | Penna |
| 64 | Martin Stein | 29 | Son | Laborer | Penna |
| 65 | Leroy Hunter | 25 | Head | Machinist | Penna |
| 66 | Mary Hunter | 23 | Wife | — | Penna |
| 67 | Joan Hunter | 5 | Daughter | — | Penna |
| 68 | Alice Reynolds | 64 | Head | — | Penna |
| 69 | Alexander Ruff | 52 | Lodger | Electrician | Penna |
| 70 | Edward Marchak | 27 | Lodger | Clerk | Penna |
| 71 | Clarence Musser | 45 | Lodger | Janitor | Penna |
| 72 | Anna Haines | 75 | Boarder | — | Penna |
| 73 | Mary Hairwan | 48 | Head | — | Ireland |
| 74 | Rosemary Hairwan | 17 | Daughter | — | Colorado |
| 75 | Ella O'Connell | 35 | Head | Mender | New York |
| 76 | Dorothy O'Connell | 12 | Daughter | — | Penna |
| 77 | Frank O'Neil | 37 | Head | Mechanic | Penna |
| 78 | Cecelia O'Neil | 35 | Wife | — | Penna |
| 79 | Edward O'Neil | 6 | Son | — | Penna |
| 80 | Ralph Fort | 62 | Head | Dishwasher | Penna |
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)