MK
Mary Knox — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Taylor-County, Iowa
Our Model Tree links this Mary Knox across the 1930 and 1940 US Censuses in Taylor-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1874), then head of a 6-person household.
Age 66
b. ~1874
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Taylor-County, Iowa |
| Surname | Knox |
| Given Name | Mary C. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Grant Township |
| 1935 Residence (County) | Taylor |
| Additional Details | |
| Industry | none |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Grant Township |
| Est. Birth Year | ~1874 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Winifred Knox | Daughter | — | 30 | ~1910 |
| Mary Knox | Spouse | — | 66 | ~1874 |
| Wilson Knox | Son | — | 27 | ~1913 |
| Howard Knox | Head | — | 66 | ~1874 |
| Evelyn Knox | Daughter | — | 26 | ~1914 |
| Ivan Knox | Son | — | 7 | ~1933 |
Census Appearances
1930
Taylor, Iowa
Other, age 56
Taylor, Iowa · implied b. ~1874 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knox |
| Given Name | Mary C. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 26 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | West Virginia |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Taylor-County, Iowa
Spouse, age 66
Taylor-County, Iowa · implied b. ~1874 — 6 household members
| Surname | Knox |
| Given Name | Mary C. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Grant Township |
| 1935 Residence (County) | Taylor |
| Industry | none |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Mary Knox across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Knox
Spouse · 1940 · age 66 · b. ~1874 · Iowa
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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 — Taylor-County, Iowa
Open full size
1940 US Federal Census — Taylor-County, Iowa
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01207-00846)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Howard S. Knox | 66 | Head | Farming | Iowa |
| 42 | Mary C. Knox THIS PERSON | 66 | Wife | — | Illinois |
| 43 | Winifred Knox | 30 | Daughter | — | Iowa |
| 44 | Evelyn Knox | 26 | Daughter | — | Iowa |
| 45 | Wilson Knox | 27 | Son | Farming | Iowa |
| 46 | Ivan C. Knox | 7 | Son | — | Iowa |
| 47 | Wesley Calkins | 24 | Head | Farm Laborer | Iowa |
| 48 | Eunice Calkins | 24 | Wife | — | Iowa |
| 49 | Rosanna Calkins | 2 | Daughter | — | Iowa |
| 50 | John C. Knox | 48 | Head | Farming | Iowa |
| 51 | Alberta O. Knox | 47 | Wife | — | Iowa |
| 52 | Lyle Knox | 14 | Son | — | Iowa |
| 53 | Herman A. Wurster | 39 | Head | Farming | Iowa |
| 54 | Idella L. Wurster | 37 | Wife | — | Iowa |
| 55 | Willis E. Wurster | 13 | Son | — | Iowa |
| 56 | Howard E. Wurster | 10 | Son | — | Iowa |
| 57 | Terylla A. Wurster | 3 | Daughter | — | Iowa |
| 58 | Roy M. Buchanan | 31 | Head | Farming | Iowa |
| 59 | Ruth F. Buchanan | 33 | Wife | — | Iowa |
| 60 | Jo Ann Buchanan | 7 | Daughter | — | Iowa |
| 61 | Bryan M. Buchanan | 60 | Head | Farming | Iowa |
| 62 | Maude S. Buchanan | 60 | Wife | — | Iowa |
| 63 | John Fine | 20 | Hired hand | Farm Laborer | Iowa |
| 64 | Edwin L. Owens | 71 | Head | Farming | Ohio |
| 65 | Della Owens | 70 | Wife | — | Illinois |
| 66 | Guy A. Beggs | 51 | Head | Farming | Iowa |
| 67 | Pearl R. Beggs | 46 | Wife | — | Iowa |
| 68 | Donald L. Beggs | 21 | Son | Farm Laborer | Iowa |
| 69 | Harry A. Beggs | 12 | Son | — | Iowa |
| 70 | Walter Cregier | 34 | Head | Farm Laborer | Iowa |
| 71 | Iona A. Cregier | 27 | Wife | — | Iowa |
| 72 | Edith Anne Cregier | 2 | Daughter | — | Iowa |
| 73 | Patsey E. Gaule | 51 | Head | Farm Laborer | Iowa |
| 74 | Leona Gaule | 46 | Wife | — | Iowa |
| 75 | Marvin A. Gaule | 21 | Son | Laborer | Iowa |
| 76 | Ruby Gaule | 15 | Daughter | — | Iowa |
| 77 | Alvin J. Alberry | 64 | Head | Farming | Iowa |
| 78 | Leota D. Alberry | 36 | Wife | — | Missouri |
| 79 | Alma S. Murphy | 73 | Head | — | 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)