MK
Mary Knapp — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Otero-County, Colorado
Our Model Tree links this Mary Knapp across the 1930 and 1940 US Censuses in Otero-County, Colorado (XGBoost, ~Confirmed) — first a spouse (b.~1896), then head of a 6-person household.
Age 44
b. ~1896
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Otero-County, Colorado |
| Surname | Knapp |
| Given Name | Mary E. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (County) | Otero |
| Additional Details | |
| Industry | 0 |
| Highest Grade | C 2 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | P J 27 Higbee |
| Est. Birth Year | ~1896 |
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 |
|---|---|---|---|---|
| Joyce Knapp | Daughter | — | 3 | ~1937 |
| Homer Knapp | Head | — | 47 | ~1893 |
| Jeanette Knapp | Daughter | — | 22 | ~1918 |
| Alden Knapp | Son | — | 15 | ~1925 |
| Grace Knapp | Daughter | — | 19 | ~1921 |
| Mary Knapp | Spouse | — | 44 | ~1896 |
Census Appearances
1930
Otero, Colorado
Other, age 33
Otero, Colorado · implied b. ~1897 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knapp |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 20 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Otero-County, Colorado
Spouse, age 44
Otero-County, Colorado · implied b. ~1896 — 6 household members
| Surname | Knapp |
| Given Name | Mary E. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (County) | Otero |
| Industry | 0 |
| Highest Grade | C 2 |
| 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 Knapp across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Knapp
Spouse · 1940 · age 44 · b. ~1896 · Colorado
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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 — Otero-County, Colorado
Open full size
1940 US Federal Census — Otero-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00473-00570)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Martha Magdelena | 2 | daughter | — | Colorado |
| 42 | Mary Alice Magdelena | 0 | daughter | — | Colorado |
| 43 | Homer A. Knapp | 47 | head | Farming | Iowa |
| 44 | Mary E. Knapp THIS PERSON | 44 | wife | — | Iowa |
| 45 | Jeanette Knapp | 22 | daughter | — | Colorado |
| 46 | Grace Knapp | 19 | daughter | — | Colorado |
| 47 | Alden Knapp | 15 | son | — | Colorado |
| 48 | Joyce Knapp | 3 | daughter | — | Colorado |
| 49 | Frank A. Kamper | 60 | head | Farming | Minnesota |
| 50 | Ella M. Kamper | 83 | mother | — | New York |
| 51 | J. H. Bowling | 53 | head | Farmer | Kentucky |
| 52 | Frances O. Bowling | 42 | wife | — | Kansas |
| 53 | E. F. Gibson | 62 | head | — | Indiana |
| 54 | Lena Gibson | 51 | wife | — | Illinois |
| 55 | Lawrence Gibson | 22 | son | Sugar Mill | Colorado |
| 56 | A. L. Roberts | 51 | head | Farmer | Kansas |
| 57 | Lura O. Roberts | 49 | wife | — | Kansas |
| 58 | Emil Roberts | 22 | son | — | Colorado |
| 59 | Delmar Roberts | 19 | daughter | — | Colorado |
| 60 | Albert Roybal | 31 | head | Farming | New Mexico |
| 61 | Erminda O. Roybal | 25 | wife | — | New Mexico |
| 62 | Jennie Roybal | 5 | daughter | — | New Mexico |
| 63 | Charlie Roybal | 2 | son | — | Colorado |
| 64 | Arthur Anderson | 26 | head | Farmer | Oklahoma |
| 65 | Margaret O. Anderson | 49 | mother | — | Kansas |
| 66 | Gertrude Anderson | 17 | sister | — | Oklahoma |
| 67 | Esther Anderson | 16 | sister | — | Oklahoma |
| 68 | John Anderson | 13 | brother | — | Oklahoma |
| 69 | Edith Anderson | 10 | sister | — | Oklahoma |
| 70 | Ira B. Gibson | 66 | head | Farming | Indiana |
| 71 | Cora O. Gibson | 49 | wife | — | Arkansas |
| 72 | Homer Gibson | 17 | son | — | Colorado |
| 73 | Robert Sullivan | 15 | lodger | — | Colorado |
| 74 | James Sullivan | 13 | lodger | — | Colorado |
| 75 | William C. O. Smith | 46 | head | Farming | Colorado |
| 76 | Marie Smith | 45 | wife | — | Illinois |
| 77 | Robert Smith | 21 | son | Farming | Colorado |
| 78 | Bruce Smith | 18 | son | — | Colorado |
| 79 | Donna Smith | 16 | daughter | — | Colorado |
| 80 | George L. O. Proctor | 63 | head | Farming | Tennessee |
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)