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William Robertson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Champaign-County, Illinois
Our Model Tree links this William Robertson across the 1920, 1930 and 1940 US Censuses in Champaign-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1873), then head of a 4-person household.
Age 67
b. ~1873
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Champaign-County, Illinois |
| Surname | Robertson |
| Given Name | William S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | City of Urbana |
| 1935 Residence (County) | Champaign |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Professor of History |
| Industry | University |
| Class of Worker | GW |
| Hours Worked | 44 |
| Income (1939) | 5000 |
| Highest Grade | C 8 |
| 1935 Residence | Same House |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Professor Of History |
| Township / Ward | City Of Urbana |
| Est. Birth Year | ~1873 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Joan Robertson | Daughter | — | 22 | ~1918 |
| William Robertson | Head | — | 67 | ~1873 |
| James Robertson | Son | — | 24 | ~1916 |
| Gertrude Robertson | Spouse | — | 54 | ~1886 |
Census Appearances
1920
Champaign, Illinois
Head, age 47
Champaign, Illinois · implied b. ~1873 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robertson |
| Given Name | William S |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1880 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Teacher |
| Industry | University of Ill |
| 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 | 1898 |
| Birthplace (normalized) | scotland |
1930
Champaign, Illinois
Head, age 57
Champaign, Illinois · implied b. ~1873 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robertson |
| Given Name | William S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1878 |
| Age at First Marriage | 40 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Teacher |
| Industry | University |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 20,000 |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Champaign-County, Illinois
Head, age 67
Champaign-County, Illinois · implied b. ~1873 — 4 household members
| Surname | Robertson |
| Given Name | William S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | City of Urbana |
| 1935 Residence (County) | Champaign |
| Naturalization Status | Naturalized |
| Occupation | Professor of History |
| Industry | University |
| Class of Worker | GW |
| Hours Worked | 44 |
| Income (1939) | 5000 |
| Highest Grade | C 8 |
| 1935 Residence | Same House |
| 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 William Robertson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Robertson
Head · 1940 · age 67 · b. ~1873 · Illinois
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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 — Champaign-County, Illinois
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1940 US Federal Census — Champaign-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00766-00211)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Barbara R. Attig | 4 | Granddaughter | — | Illinois |
| 42 | Chris S. Rhode | 49 | Head | Psychology Professor | Indiana |
| 43 | Julia H. Rhode | 49 | Wife | — | Illinois |
| 44 | Sally S. Rhode | 20 | Daughter | — | Illinois |
| 45 | Samuel N. Will | 40 | Head | Professor Of French | Virginia |
| 46 | Constance B. Will | 42 | Wife | — | Indiana |
| 47 | Samuel N. Jr. Will | 11 | Son | — | Connecticut |
| 48 | John T. Buchholz | 51 | Head | Professor Of Botany | Nebraska |
| 49 | Olive Buchholz | 52 | Wife | — | Iowa |
| 50 | Peter Krausz | 29 | Lodger | Chemist | Illinois |
| 51 | Charles E. Hildegard | 29 | Lodger | Teacher | Illinois |
| 52 | Frank W. Dewolf | 59 | Head | Professor Of Geology | Iowa |
| 53 | Fanny S. Dewolf | 59 | Wife | — | Illinois |
| 54 | Frank W. Jr. Dewolf | 21 | Son | — | Illinois |
| 55 | Fannie S. Dempsey | 91 | Mother-in-law | — | New York |
| 56 | Robert E. Hieronymus | 76 | Head | Professor | Illinois |
| 57 | Lois C. Hieronymus | 61 | Wife | — | Illinois |
| 58 | John T. Colvin | 54 | Head | Real Estate Dealer | Illinois |
| 59 | Mabel K. Colvin | 53 | Wife | — | Illinois |
| 60 | Constance Colvin | 18 | Daughter | — | Illinois |
| 61 | Whitney C. Huntington | 52 | Head | Professor Of Civil Engineering | Colorado |
| 62 | Vera R. Huntington | 49 | Wife | — | Kansas |
| 63 | Dorothy A. Huntington | 19 | Daughter | — | Colorado |
| 64 | Ruth A. Huntington | 8 | Daughter | — | Illinois |
| 65 | Jacob S. Rogers | 45 | Head | Air Corp Officer | North Carolina |
| 66 | Shirley Rogers | 41 | Wife | — | Ohio |
| 67 | Caroline Alexander | 31 | Maid | Maid | North Carolina |
| 68 | Kathryn Alexander | 16 | Maid-Daughter | Student | North Carolina |
| 69 | Horace Alexander | 9 | Maid-Son | — | Columbus |
| 70 | Clarence W. Ham | 58 | Head | Professor Of Mechanical Engineering | Kentucky |
| 71 | Martha D. Ham | 56 | Wife | — | Kentucky |
| 72 | Wilbur D. Ham | 23 | Son | — | New York |
| 73 | Cullen W. Parmelee | 64 | Head | Professor Of Ceramics Engineering | New York |
| 74 | Julia D. Parmelee | 64 | Wife | — | New Jersey |
| 75 | William A. Neiswanger | 39 | Head | Professor Of Economics | Kansas |
| 76 | Lilian B. Neiswanger | 39 | Wife | — | Kansas |
| 77 | William S. Robertson THIS PERSON | 67 | Head | Professor Of History | Scotland |
| 78 | Gertrude Robertson | 54 | Wife | — | Ohio |
| 79 | James M. Robertson | 24 | Son | — | Illinois |
| 80 | Joan Robertson | 22 | Daughter | — | Illinois |
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)