RB
Robert Blair — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this Robert Blair across the 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1877), then head of a 3-person household.
Age 63
b. ~1877
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Blair |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Eddystone |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Occupation | Janitor |
| Industry | oil refinery |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | 3 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Janitor |
| Township / Ward | Eddystone |
| Est. Birth Year | ~1877 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Agnes Blair | Spouse | — | 63 | ~1877 |
| Robert Blair | Head | — | 63 | ~1877 |
| Jean Blair | Daughter | — | 30 | ~1910 |
Census Appearances
1920
Delaware, Pennsylvania
Head, age 42
Delaware, Pennsylvania · implied b. ~1878 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1888 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Clerk |
| Industry | Cloth Factory |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | Scotland |
| Year of Naturalization | 1897 |
| Birthplace (normalized) | scotland |
1930
Delaware, Pennsylvania
Head, age 52
Delaware, Pennsylvania · implied b. ~1878 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | Robert J. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1888 |
| Age at First Marriage | 27 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | clerk |
| Industry | textile printing |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 5500 |
| Radio Set | R |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Delaware-County, Pennsylvania
Head, age 63
Delaware-County, Pennsylvania · implied b. ~1877 — 3 household members
| Surname | Blair |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Eddystone |
| 1935 Residence (County) | Delaware |
| Occupation | Janitor |
| Industry | oil refinery |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | 3 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 Blair across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Robert Blair
Head · 1940 · age 63 · b. ~1877 · 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 — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03491-00213)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret Bryan | 28 | daughter | Stenographer | Pennsylvania |
| 2 | Harold Bryan | 18 | son | Usher | Pennsylvania |
| 3 | Ruth Bryan | 12 | daughter | — | Pennsylvania |
| 4 | Harvey Hentzel | 59 | Head | Riveter | Pennsylvania |
| 5 | Stella Hentzel | 58 | wife | — | Pennsylvania |
| 6 | Helen Hentzel | 23 | daughter | Stenographer | Pennsylvania |
| 7 | James H. Hill | 46 | Head | Foreman | Maryland |
| 8 | Hettie Hill | 46 | wife | — | Pennsylvania |
| 9 | Dolores Hill | 23 | daughter | Trained Nurse | Pennsylvania |
| 10 | Ruth Hill | 11 | daughter | — | Pennsylvania |
| 11 | Sarah Mcnichol | 69 | head | — | Irish Free State |
| 12 | Thomas Mcnichol | 35 | son | Crane Runner | Pennsylvania |
| 13 | Helen Mcnichol | 30 | daughter | Stenographer | Pennsylvania |
| 14 | James Mcnichol | 41 | son | Layer-Out | Pennsylvania |
| 15 | Anna Mcnichol | 40 | daughter in law | — | Pennsylvania |
| 16 | Sarah A. Mcnichol | 1 | daughter | — | Pennsylvania |
| 17 | Harrison Patrick | 35 | Head | Salesman | Pennsylvania |
| 18 | Gladys Patrick | 35 | wife | — | Pennsylvania |
| 19 | Doris Patrick | 14 | daughter | — | Pennsylvania |
| 20 | Marion Patrick | 13 | daughter | — | Pennsylvania |
| 21 | Harrison Jr. Patrick | 12 | son | — | Pennsylvania |
| 22 | William Newling | 37 | head | Layout | Pennsylvania |
| 23 | Mabel Newling | 36 | wife | — | Pennsylvania |
| 24 | William Newling | 15 | son | — | Pennsylvania |
| 25 | Carl Wagner | 21 | lodger | Kettleman | Pennsylvania |
| 26 | Robert Blair THIS PERSON | 63 | Head | Janitor | Scotland |
| 27 | Agnes Blair | 63 | wife | — | Scotland |
| 28 | Jean Blair | 30 | daughter | Clerk | Pennsylvania |
| 29 | Valis Pula | 72 | Head | — | Albania |
| 30 | Mila Pula | 65 | wife | — | Albania |
| 31 | Charles Pula | 42 | son | Proprietor | Albania |
| 32 | Pauline Pula | 42 | daughter in law | — | Albania |
| 33 | Nicholas Pula | 30 | son | Bartender | Albania |
| 34 | Minnie Pula | 28 | daughter in law | — | Turkey |
| 35 | Louis Pula | 9 | grandson | — | Pennsylvania |
| 36 | Martha Pula | 6 | granddaughter | — | Pennsylvania |
| 37 | Jennie Montgomery | 75 | Head | — | New York |
| 38 | Edward Schoenberger | 37 | son-in-law | Lathe-Hand | Pennsylvania |
| 39 | Elizabeth Schoenberger | 34 | daughter | — | Pennsylvania |
| 40 | Edward Jr. Schoenberger | 9 | son | — | Pennsylvania |
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)