RB
Robert Blair — 1900 US Census Record
Linked across censuses1900 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this Robert Blair across the 1900, 1910 and 1920 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1851), then head of a 5-person household.
Age 49
b. ~1851
Male
Head
Born: Scotland
Married
1900 Census Record Details
| Census Year | 1900 |
| Location | Philadelphia, Pennsylvania |
| Surname | Blair |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Scotland |
| Birth Month | May |
| Birth Year | 1851 |
| Year of Immigration | 1867 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Additional Details | |
| Occupation | Carpenter |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Carpenter |
| Township / Ward | Philadelphia City |
| Est. Birth Year | ~1851 |
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 1900 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Blair | Spouse | — | 67 | ~1833 |
| Harry Blair | Son | — | 18 | ~1882 |
| Robert Blair | Head | — | 49 | ~1851 |
| James Blair | Son | — | 21 | ~1879 |
| John Thorp | Other | — | 30 | ~1870 |
Census Appearances
1900
Philadelphia, Pennsylvania
Head, age 49
Philadelphia, Pennsylvania · implied b. ~1851 — 5 household members
| Surname | Blair |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Scotland |
| Birth Month | May |
| Birth Year | 1851 |
| Year of Immigration | 1867 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Carpenter |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1910
Philadelphia, Pennsylvania
Other, age 63
Philadelphia, Pennsylvania · implied b. ~1847 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | Robert |
| Relationship to Head | Father |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Scotland |
| Year of Immigration | 1873 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Carpenter |
| Industry | House |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1920
Philadelphia, Pennsylvania
Other, age 74
Philadelphia, Pennsylvania · implied b. ~1846 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | Robert |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 74 |
| Marital Status | Widowed |
| Birthplace | Scotland |
| Year of Immigration | 1882 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| 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 (1900, 1910 and 1920) in Philadelphia, Pennsylvania, using XGBoost record linkage.
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This person
Anchor record
Robert Blair
Head · 1900 · age 49 · b. ~1851 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1900 US Federal Census — Philadelphia, Pennsylvania
Open full size
1900 US Federal Census — Philadelphia, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1900:12thcensusofpopu1468unit:0198)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Michael Mcclenaghan | 29 | Head | Fireman, Loco. | Ireland |
| 2 | Mary Mcclenaghan | 25 | Wife | — | Ireland |
| 3 | Charles Mcclenaghan | 2 | Son | — | Pennsylvania |
| 4 | Henry Mcclenaghan | 1 | Son | — | Pennsylvania |
| 5 | Thomas Ryan | 27 | Boarder | Laborer | Ireland |
| 6 | John Callahan | 29 | Head | Wholesale Liquors | New York |
| 7 | Ida Callahan | 23 | Wife | — | Germany |
| 8 | John Callahan | 2 | Son | — | Pennsylvania |
| 9 | Francis Callahan | None | Son | — | Pennsylvania |
| 10 | Thomas Donahoe | 37 | Head | Driver, Fur. Car. | Pennsylvania |
| 11 | Elmira Donahoe | 39 | Wife | — | New York |
| 12 | Amy Slater | 22 | Sis-in-law | Dressmaker | New York |
| 13 | Mary Quigley | 15 | Step Daughter | At School | Pennsylvania |
| 14 | William Bowers | 55 | Head | Carriage Stable | Pennsylvania |
| 15 | Gussie Bowers | 30 | Wife | — | Pennsylvania |
| 16 | Michael Grace | 30 | Head | "Driver, ""Coal""" | Ireland |
| 17 | Annie Grace | 30 | Wife | — | Ireland |
| 18 | Annie Grace | 7 | Daughter | — | Pennsylvania |
| 19 | Michael J. Grace | 3 | Son | — | Pennsylvania |
| 20 | James Grace | None | Son | — | Pennsylvania |
| 21 | Mary Reed | 67 | Roomer | Washing | Ireland |
| 22 | Robert Blair THIS PERSON | 49 | Head | Carpenter | Scotland |
| 23 | Elizabeth Blair | 66 | Wife | — | Ireland |
| 24 | James Blair | 20 | Son | Paper Hanger | Pennsylvania |
| 25 | Harry Blair | 17 | Son | Driver, Produce | Pennsylvania |
| 26 | John Thorp | 29 | Step son | Watch Case Maker | Pennsylvania |
| 27 | Benjamin Boyd | 32 | Head | Riggers Helper | Delaware |
| 28 | Hannah Boyd | 27 | Wife | — | Pennsylvania |
| 29 | Benjamin Boyd | 8 | Son | At School | Pennsylvania |
| 30 | Philip Boyd | 7 | Son | At School | Pennsylvania |
| 31 | William Boyd | 4 | Son | — | Pennsylvania |
| 32 | Susie Boyd | 2 | Daughter | — | Pennsylvania |
| 33 | Margaret Boyd | None | Daughter | — | Pennsylvania |
| 34 | Emily Dorman | 46 | Head | Waitress | Pennsylvania |
| 35 | Samuel Dorman | 30 | Nephew | Helper In Hat Fac. | Pennsylvania |
| 36 | Laura Dorman | 26 | Niece | — | Pennsylvania |
| 37 | Lolanences Dorman | 5 | G. Nephew | — | Pennsylvania |
| 38 | Ernest Dorman | 3 | G. Nephew | — | Pennsylvania |
| 39 | Emily Dorman | 1 | G. Niece | — | Pennsylvania |
| 40 | Fannie Dorman | 27 | Niece | Service, House | Pennsylvania |
| 41 | Rebecca Bradshaw | 62 | Head | Laundress | Pennsylvania |
| 42 | Elizabeth Bradshaw | 25 | Daughter | Laundress | Pennsylvania |
| 43 | Irene Smiths | 5 | G. Daughter | — | Pennsylvania |
| 44 | G. Austin Smiths | 4 | G. son | — | Pennsylvania |
| 45 | Allen R. Smiths | 1 | G. son | — | Pennsylvania |
| 46 | James Alexander | 33 | Head | Elevatorman | N. Carolina |
| 47 | Lucy Alexander | 26 | Wife | — | Virginia |
| 48 | Charles Moody | 27 | Boarder | Musician | Virginia |
| 49 | Marshall Rosemond | 27 | Head | Rigger | West Indies (Port) |
| 50 | Juliet De Nost | 20 | Boarder | Cigar Maker | Cuba |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1900 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)