MK
Mary Knox — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Winneshiek, Iowa
Our Model Tree links this Mary Knox across the 1920, 1930 and 1940 US Censuses in Winneshiek, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1884), then head of a 10-person household.
Age 46
b. ~1884
Female
Spouse
Born: Iowa
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Winneshiek, Iowa |
| Surname | Knox |
| Given Name | Mary A H |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 33 |
| Father's Birthplace | At Sea |
| Mother's Birthplace | Iowa |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Burr Oak Township |
| Est. Birth Year | ~1884 |
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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Thomas Knox | Son | — | 14 | ~1916 |
| Geraldine Knox | Daughter | — | 9 | ~1921 |
| Thomas Knox | Head | — | 42 | ~1888 |
| Genevieve Knox | Daughter | — | 11 | ~1919 |
| Grace Knox | Daughter | — | 20 | ~1910 |
| Marcella Knox | Daughter | — | 6 | ~1924 |
| Regina Knox | Daughter | — | 22 | ~1908 |
| Vera Knox | Daughter | — | 16 | ~1914 |
| Mildred Knox | Daughter | — | 18 | ~1912 |
| Mary Knox | Spouse | — | 46 | ~1884 |
Census Appearances
1920
Winneshiek, Iowa
Spouse, age 35
Winneshiek, Iowa · implied b. ~1885 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knox |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | At Sea |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Winneshiek, Iowa
Spouse, age 46
Winneshiek, Iowa · implied b. ~1884 — 10 household members
| Surname | Knox |
| Given Name | Mary A H |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 33 |
| Father's Birthplace | At Sea |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Winneshiek-County, Iowa
Head, age 56
Winneshiek-County, Iowa · implied b. ~1884 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knox |
| Given Name | Margaret A |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Burr Oak twp |
| 1935 Residence (County) | Winneshiek |
| Industry | H |
| Class of Worker | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Knox
Spouse · 1930 · age 46 · b. ~1884 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Winneshiek, Iowa
Open full size
1930 US Federal Census — Winneshiek, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel688:0615)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Harold Henry Quammen | 27 | Head | Farmer | Iowa |
| 52 | Leonard O Quammen | 29 | Brother | Laborer | Iowa |
| 53 | William Jacobson | 48 | Head | Farmer | Minnesota |
| 54 | Maud V Jacobson | 36 | Wife | — | Iowa |
| 55 | Carroll H Jacobson | 6 | Son | — | Iowa |
| 56 | Berd Lyall A Jacobson | 5 | Son | — | Iowa |
| 57 | Hans Jacobson | 66 | Father | — | Norway |
| 58 | Kallman Erickson | 36 | R | Laborer | Iowa |
| 59 | Hilda J H Erickson | 32 | Wife | — | Iowa |
| 60 | Marcella E Erickson | 4 | Daughter | — | Iowa |
| 61 | Phyllis L Erickson | 1 | Daughter | — | Iowa |
| 62 | A G Newhouse | 45 | Head | Farmer | Minnesota |
| 63 | Myrtle K Newhouse | 46 | Wife | — | Iowa |
| 64 | Verna A Newhouse | 20 | Daughter | Teacher | North Dakota |
| 65 | Maynard A Newhouse | 17 | Son | — | Iowa |
| 66 | Stella M Newhouse | 15 | Daughter | — | Iowa |
| 67 | Ole Nelson | 46 | Head | Farmer | Norway |
| 68 | Emma A Nelson | 36 | Wife | — | Iowa |
| 69 | Minnie S Nelson | 16 | Daughter | — | Iowa |
| 70 | Olga E Nelson | 11 | Daughter | — | Iowa |
| 71 | M J Donlan | 57 | Head | Farmer | Wisconsin |
| 72 | Mary M Donlan | 54 | Wife | — | Iowa |
| 73 | Walter J Donlan | 31 | Son | Laborer | Iowa |
| 74 | Mary J Donlan | 29 | Daughter | Patch | Iowa |
| 75 | Leonard M Donlan | 27 | Son | Laborer | Iowa |
| 76 | Catherine A Donlan | 24 | Daughter | Maid | Iowa |
| 77 | Alice J Donlan | 22 | Daughter | Maid | Iowa |
| 78 | Joseph M Donlan | 13 | Son | — | Iowa |
| 79 | Thomas E Knox | 42 | Head | Farmer | Iowa |
| 80 | Mary A H Knox THIS PERSON | 46 | Wife | — | Iowa |
| 81 | Regina E Knox | 22 | Daughter | Teacher | Iowa |
| 82 | Grace A Knox | 20 | Daughter | Teacher | Iowa |
| 83 | Mildred C Knox | 18 | Daughter | — | Iowa |
| 84 | Vera L Knox | 16 | Daughter | — | Iowa |
| 85 | Thomas J Knox | 14 | Son | — | Iowa |
| 86 | Genevieve J Knox | 11 | Daughter | — | Iowa |
| 87 | Geraldine G Knox | 9 | Daughter | — | Iowa |
| 88 | Marcella A Knox | 6 | Daughter | — | Iowa |
| 89 | Charles E Porter | 66 | Head | Farmer | Iowa |
| 90 | John Donlan | 60 | Head | Odd Jobs | Wisconsin |
| 91 | Charles S Waldorf | 48 | Head | Farmer | Iowa |
| 92 | Mary E Waldorf | 39 | Wife | — | Michigan |
| 93 | Irene O Waldorf | 21 | Daughter | — | South Dakota |
| 94 | Warren J Waldorf | 18 | Son | Laborer | South Dakota |
| 95 | Grace J Waldorf | 14 | Daughter | — | Wisconsin |
| 96 | Kenneth H Waldorf | 12 | Son | — | Michigan |
| 97 | Robert D Waldorf | 10 | Son | — | Michigan |
| 98 | Ruth L Waldorf | 8 | Daughter | — | South Dakota |
| 99 | Ellamae Waldorf | 4 | Daughter | — | Washington |
| 100 | Stewart M Waldorf | 3 | Son | — | Washington |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)