MH
Mary Harper — 1940 US Census Record
Model Tree available1940 United States Federal Census · Westchester-County, New York
Our Model Tree links this Mary Harper across the 1920, 1930 and 1940 US Censuses in Westchester-County, New York (XGBoost, ~Confirmed), with identified parents Samuel & Birdie — first a daughter (b.~1915), then head of a 4-person household.
Age 25
b. ~1915
Female
Daughter
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Westchester-County, New York |
| Surname | Harper |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Mt. Vernon |
| 1935 Residence (County) | Westchester |
| Additional Details | |
| Occupation | Mangle shaker |
| Industry | Laundry |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 448 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Mangle Shaker |
| Township / Ward | Mt Vernon |
| Est. Birth Year | ~1915 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Harper | Daughter | — | 25 | ~1915 |
| Martha Harper | Daughter | — | 28 | ~1912 |
| Birdie Harper | Head | — | 67 | ~1873 |
| Aloysius Harper | Son | — | 40 | ~1900 |
Census Appearances
1920
Westchester, New …
Daughter, age 6
Westchester, New York · implied b. ~1914 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 6 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Westchester, New …
Daughter, age 16
Westchester, New York · implied b. ~1914 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Westchester-County, New …
Daughter, age 25
Westchester-County, New York · implied b. ~1915 — 4 household members
| Surname | Harper |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Mt. Vernon |
| 1935 Residence (County) | Westchester |
| Occupation | Mangle shaker |
| Industry | Laundry |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 448 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 Harper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Samuel Harper (~0.92 confidence) and mother Birdie Harper (~0.92 confidence) and mother Birdie Harper (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Samuel Harper
b. ~1856
Source father
● Household
· direct · ~0.92
Mother
Birdie Harper
b. ~1873
Source mother
● Household
· direct · ~0.92
Mother
Birdie Harper
b. ~1874
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Harper
Daughter · 1940 · age 25 · b. ~1915 · New York
★ You are viewing this record
Sibling
Martha Harper
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Aloysius Harper
Sibling · 1940 · age 40
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Westchester-County, New York
Open full size
1940 US Federal Census — Westchester-County, New York
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-02807-00491)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elizabeth Genevazza | 18 | Lodger | Waitress | New York |
| 2 | Rachel St. Clair | 56 | Lodger | Astrologist | England |
| 3 | Gertrude Goodwin | 39 | Head | Housemaid | New York |
| 4 | Jesse Goodwin | 15 | Son | — | New York |
| 5 | Helen Goodwin | 13 | Daughter | — | New York |
| 6 | Elizabeth Anselm | 38 | Head | Housekeeper | South Carolina |
| 7 | Wallace Pierce | 30 | Lodger | Counterman | North Carolina |
| 8 | Martha Pierce | 26 | Lodger's wife | Housekeeper | North Carolina |
| 9 | Rebecca Jones | 35 | Lodger | Housekeeper | Virginia |
| 10 | Birdie Harper | 67 | Head | — | Ohio |
| 11 | Martha Harper | 28 | Daughter | Housekeeper | New York |
| 12 | Mary Harper THIS PERSON | 25 | Daughter | Mangle Shaker | New York |
| 13 | Aloysius Harper | 40 | Son | Machinist | New York |
| 14 | Ellen Finnegan | 69 | Head | Housekeeper | Eire |
| 15 | Eugene Finnegan | 67 | Brother | — | Eire |
| 16 | Peter Fiscella | 38 | Head | Laborer | Italy |
| 17 | Catherine Fiscella | 31 | Wife | — | Austria-England |
| 18 | Maurice Fiscella | 3 | Son | — | New York |
| 19 | Alexander Shaw | 44 | Head | Painter | Northumberland |
| 20 | Jeanne Shaw | 44 | Wife | — | Belgium |
| 21 | Harold Patten | 70 | Head | — | New York |
| 22 | Charles Patten | 41 | Son | Sales Clerk | New York |
| 23 | Catherine Patten | 26 | Daughter-in-law | — | Pennsylvania |
| 24 | Mary Boyle | 57 | Lodger | — | New York |
| 25 | Carol Patten | 12 | Granddaughter | — | New York |
| 26 | Harold J. Winfield | 51 | Head | Lawyer | England |
| 27 | Elizabeth C. Winfield | 44 | Wife | — | England |
| 28 | Edward J. Winfield | 10 | Son | — | New York |
| 29 | Robert C. Winfield | 8 | Son | — | New York |
| 30 | Arthur Werle | 42 | Head | Electrician | New York |
| 31 | Velmae Werle | 36 | Wife | — | New York |
| 32 | Barbara Werle | 11 | Daughter | — | New York |
| 33 | Donald Werle | 9 | Son | — | New York |
| 34 | Douglas Werle | 5 | Son | — | New York |
| 35 | Stratos Kingos | 58 | Head | Candy Maker | Greece |
| 36 | Mary Kingos | 43 | Wife | — | Greece |
| 37 | Edith Kingos | 16 | Daughter | — | New York |
| 38 | John Kingos | 15 | Son | — | New York |
| 39 | Chris Clio | 58 | Cousin | Dish Washer | Greece |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)