MK
Mary Knapp — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kings-County, New York
Our Model Tree links this Mary Knapp across the 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1913), then head of a 7-person household.
Age 27
b. ~1913
Female
Spouse
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Knapp |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | New York City |
| Est. Birth Year | ~1913 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Anton Knapp | Head | — | 41 | ~1899 |
| Henrietta Knapp | Daughter | — | ~1940 | |
| Edward Knapp | Son | — | 2 | ~1938 |
| Mary Knapp | Spouse | — | 27 | ~1913 |
| Marie Knapp | Daughter | — | 4 | ~1936 |
| Elizabeth Knapp | Daughter | — | 7 | ~1933 |
| Anthony Knapp | Son | — | 6 | ~1934 |
Census Appearances
1930
Kings, New …
Daughter, age 17
Kings, New York · implied b. ~1913 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nappi |
| Given Name | Maria |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Italy |
| Mother's Birthplace | Italy |
| Occupation | Clerk |
| Industry | Laundry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Kings-County, New …
Spouse, age 27
Kings-County, New York · implied b. ~1913 — 7 household members
| Surname | Knapp |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 27 · b. ~1913 · New York
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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 — Kings-County, New York
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1940 US Federal Census — Kings-County, New York
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-02602-00296)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dominick Deacone | 84 | Head | — | Italy |
| 2 | Josephine Deacone | 79 | Wife | — | Italy |
| 3 | Charles J Faber | 45 | Head | Mechanics Helper | New York |
| 4 | Margaret G Faber | 41 | Wife | — | New York |
| 5 | Charles Faber | 20 | Son | New Worker | New York |
| 6 | Mary E Faber | 17 | Daughter | New Worker | New York |
| 7 | Rose Carroll | 62 | Head | Housework | New York |
| 8 | Thomas Carroll | 25 | Son | Laborer | New York |
| 9 | Matthew Mcelvaine | 32 | Head | Electrician Helper | New York |
| 10 | Anna Duperre | 33 | Lodger | Bottler | Rhode Island |
| 11 | Wilfred Duperre | 9 | Lodger | — | Massachusetts |
| 14 | Anton Knapp | 41 | Head | Laborer | New York |
| 15 | Mary Knapp THIS PERSON | 27 | Wife | — | Pennsylvania |
| 16 | Elizabeth Knapp | 7 | Daughter | — | New York |
| 17 | Anthony Knapp | 6 | Son | — | New York |
| 18 | Marie Knapp | 4 | Daughter | — | New York |
| 19 | Edward Knapp | 2 | Son | — | New York |
| 20 | Henrietta Knapp | 0 | Daughter | — | New York |
| 21 | Biagio Moreno | 26 | Head | Contractor | New York |
| 22 | Anne Moreno | 27 | Wife | — | New York |
| 23 | William Moreno | 0 | Son | — | New York |
| 24 | John Ryan | 29 | Head | Proprietor | New York |
| 25 | Connie Ryan | 27 | Wife | Stenographer | New York |
| 26 | John Ryan | 5 | Son | — | New York |
| 27 | Concetta Moreno | 46 | Head | — | New York |
| 28 | Rocco Moreno | 24 | Son | Contractor | New York |
| 30 | William Hines | 82 | Head | — | North Ireland |
| 31 | Eleanor Hines | 84 | Wife | — | Eire |
| 32 | Eleanor Baden | 20 | Granddaughter | Floor Girl | New York |
| 33 | Nicholas Palmiotto | 50 | Head | — | Italy |
| 34 | Mary Palmiotto | 46 | Wife | — | New York |
| 35 | James Palmiotto | 18 | Son | Asst Collector | New York |
| 36 | Rose Palmiotto | 16 | Daughter | — | New York |
| 37 | Edward Palmiotto | 14 | Son | — | New York |
| 38 | Victor Palmiotto | 12 | Son | — | New York |
| 39 | John Palmiotto | 10 | Son | — | New York |
| 40 | Ruth Palmiotto | 8 | Daughter | — | New York |
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)