MK
Mary Knight — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Boone-County, Iowa
Our Model Tree links this Mary Knight across the 1920, 1930 and 1940 US Censuses in Boone-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1883), then head of a 6-person household.
Age 57
b. ~1883
Female
Spouse
Born: Kansas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Boone-County, Iowa |
| Surname | Knight |
| Given Name | Mary B. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | Boone City |
| 1935 Residence (County) | Boone |
| Additional Details | |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Township / Ward | Boone City |
| Est. Birth Year | ~1883 |
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 |
|---|---|---|---|---|
| Margaret Knight | Daughter | — | 25 | ~1915 |
| M Knight | Daughter | — | 27 | ~1913 |
| Dorothy Knight | Daughter | — | 21 | ~1919 |
| Charles Knight | Head | — | 60 | ~1880 |
| Donald Knight | Son | — | 19 | ~1921 |
| Mary Knight | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Boone, Iowa
Spouse, age 36
Boone, Iowa · implied b. ~1884 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knight |
| Given Name | Mary B. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Kansas |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1930
Boone, Iowa
Spouse, age 46
Boone, Iowa · implied b. ~1884 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knight |
| Given Name | Mary B. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Kansas |
| Age at First Marriage | 28 |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Iowa |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | 70 |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Boone-County, Iowa
Spouse, age 57
Boone-County, Iowa · implied b. ~1883 — 6 household members
| Surname | Knight |
| Given Name | Mary B. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | Boone City |
| 1935 Residence (County) | Boone |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 Knight across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Knight
Spouse · 1940 · age 57 · b. ~1883 · 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 — Boone-County, Iowa
Open full size
1940 US Federal Census — Boone-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01141-00241)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Gilbert H. Houseman | 44 | Head | Baggageman | Minnesota |
| 2 | Vera L. Houseman | 38 | Wife | — | Iowa |
| 3 | Donald K. Houseman | 12 | Son | — | Iowa |
| 4 | Melvin M. Kilgore | 57 | Head | Sheet Metal Wkr | Iowa |
| 5 | Fannie E. Kilgore | 55 | Wife | — | Iowa |
| 6 | Charles H. Knight | 60 | Head | Timekeeper | Illinois |
| 7 | Mary B. Knight THIS PERSON | 57 | Wife | — | Kansas |
| 8 | M. Catherine Knight | 27 | Daughter | Registered Nurse | Iowa |
| 9 | Margaret A. Knight | 25 | Daughter | Bookkeeper | Iowa |
| 10 | Dorothy J. Knight | 21 | Daughter | Stenographer | Iowa |
| 11 | Donald E. Knight | 19 | Son | — | Iowa |
| 12 | Edward P. Dougherty | 72 | Head | — | Illinois |
| 13 | Grace L. Dougherty | 58 | Wife | — | Pennsylvania |
| 14 | Thomas H. Long | 52 | Head | Traveling Salesman | Iowa |
| 15 | Laurette D. Long | 48 | Wife | — | Iowa |
| 16 | Pauline Long | 22 | Daughter | Substitute Teacher | Iowa |
| 17 | Alfred P. Harrington | 25 | Head | Operator | Kansas |
| 18 | Maxine Harrington | 21 | Wife | — | Kansas |
| 19 | Marsha Harrington | 3 | Daughter | — | Kansas |
| 20 | Jesse E. Luther | 47 | Head | Bookkeeper | Iowa |
| 21 | Kathryn E. Luther | 48 | Wife | — | Iowa |
| 22 | Robert E. Luther | 22 | Son | Laborer | Iowa |
| 23 | Ray R. Stephens | 50 | Head | Salesman | Iowa |
| 24 | Patsy J. Stephens | 51 | Wife | — | Iowa |
| 25 | John W. Abbott | 78 | Head | — | Iowa |
| 26 | Sarah J. Abbott | 74 | Wife | — | England |
| 27 | Walter H. Schultz | 48 | Head | Asst. Mast. Mechanic | Illinois |
| 28 | Frances E. Schultz | 45 | Wife | — | Colorado |
| 29 | Anna M. Schultz | 17 | Daughter | — | Wisconsin |
| 30 | Betty L. Schultz | 13 | Daughter | — | Wisconsin |
| 31 | Wm. H. Reckenberg | 78 | Head | — | Germany |
| 32 | Mary M. Reckenberg | 75 | Wife | — | Illinois |
| 33 | Clarence E. Jones | 64 | Head | Laborer | Iowa |
| 34 | Elizabeth H. Jones | 58 | Wife | — | Indiana |
| 35 | Henry C. Jones | 36 | Son | Attendant | Iowa |
| 36 | Catherine E. Jones | 23 | Daughter | Switchboard Operator | Iowa |
| 37 | Donald D. Jones | 21 | Son | Attendant | Iowa |
| 38 | Iver O. Hansen | 59 | Head | — | Iowa |
| 39 | Mary M. Hansen | 55 | Wife | — | Iowa |
| 40 | Thomas E. Hansen | 22 | Son | — | Iowa |
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)