MC
Mary Conrad — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Nassau-County, New York
Our Model Tree links this Mary Conrad across the 1930 and 1940 US Censuses in Nassau-County, New York (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 8-person household.
Age 18
b. ~1922
Female
Daughter
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Nassau-County, New York |
| Surname | Conrad |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New Hyde Park village |
| 1935 Residence (County) | Nassau |
| Additional Details | |
| Hours Worked | 48 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Township / Ward | New Hyde Park Village |
| Est. Birth Year | ~1922 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Theresa Conrad | Daughter | — | 12 | ~1928 |
| Frank Conrad | Son | — | 28 | ~1912 |
| Rose Conrad | Daughter | — | 26 | ~1914 |
| Mary Conrad | Daughter | — | 18 | ~1922 |
| Charles Conrad | Head | — | 50 | ~1890 |
| Linda Conrad | Daughter | — | 16 | ~1924 |
| Helen Conrad | Daughter | — | 20 | ~1920 |
| Charles Conrad | Son | — | 21 | ~1919 |
Census Appearances
1930
Nassau, New …
Daughter, age 8
Nassau, New York · implied b. ~1922 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Conrad |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Germany |
| Mother's Birthplace | New York |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Nassau-County, New …
Daughter, age 18
Nassau-County, New York · implied b. ~1922 — 8 household members
| Surname | Conrad |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New Hyde Park village |
| 1935 Residence (County) | Nassau |
| Hours Worked | 48 |
| 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 Conrad across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Conrad
Daughter · 1940 · age 18 · b. ~1922 · New York
★ You are viewing this record
Sibling
Rose Conrad
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Conrad
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Conrad
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Linda Conrad
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Conrad
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Conrad
Sibling · 1940 · age 12
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 — Nassau-County, New York
Open full size
1940 US Federal Census — Nassau-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02683-00744)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles Conrad | 50 | Head | Carpenter | Germany |
| 2 | Frank Conrad | 28 | Son | Garage Attendant | New York |
| 3 | Rose Conrad | 26 | Daughter | Saleslady | New York |
| 4 | Charles Jr Conrad | 21 | Son | — | New York |
| 5 | Helen Conrad | 20 | Daughter | Salesgirl | New York |
| 6 | Mary Conrad THIS PERSON | 18 | Daughter | — | New York |
| 7 | Linda Conrad | 16 | Daughter | — | New York |
| 8 | Theresa Conrad | 12 | Daughter | — | New York |
| 9 | Catherine Proctor | 21 | Head | — | New York |
| 10 | William Proctor | 24 | Brother | Butcher | New York |
| 11 | Frederick Savage | 30 | Head | Policeman | New York |
| 12 | Thelma Savage | 25 | Wife | — | New York |
| 13 | Genaro Raccuia | 55 | Head | Polisher | Italy |
| 14 | Mary Raccuia | 55 | Wife | — | Italy |
| 15 | Mary Raccuia | 23 | Daughter | Presser | New York |
| 16 | Ralph Raccuia | 30 | Son | Proprietor | New York |
| 17 | Mary Raccuia | 30 | Daughter-in-law | — | New York |
| 18 | Frank Raccuia | 8 | Grandson | — | New York |
| 19 | Anthony Raccuia | 4 | Grandson | — | New York |
| 20 | William Baer | 38 | Head | Gardener | New York |
| 21 | Emily Baer | 34 | Wife | — | New York |
| 22 | Doris Baer | 13 | Daughter | — | New York |
| 23 | Janet Baer | 5 | Daughter | — | New York |
| 24 | Michael Julian | 25 | Head | Chauffeur | New York |
| 25 | Philomena Julian | 24 | Wife | Dress Operator | New York |
| 26 | Frank Alluin | 49 | Head | Stationary Engineer | Pennsylvania |
| 27 | Elizabeth Alluin | 48 | Wife | — | Ireland |
| 28 | Francis Alluin | 27 | Son | Clerk | New York |
| 29 | James Alluin | 21 | Son | Electrician Apprentice | New York |
| 30 | Margaret Alluin | 19 | Daughter | Typist | New Jersey |
| 31 | Elizabeth Alluin | 15 | Daughter | — | New Jersey |
| 32 | Walter C Kierling | 54 | Head | Painter | New York |
| 33 | Blair M Kierling | 51 | Wife | — | New York |
| 34 | John Kessler | 36 | Head | Bus Driver | Pennsylvania |
| 35 | Marion B Kessler | 30 | Wife | — | New York |
| 36 | Carol Lee Kessler | 2 | Daughter | — | New York |
| 37 | George Krumwiede | 58 | Head | Manager | New York |
| 38 | Matilda Krumwiede | 58 | Wife | — | New York |
| 39 | John Johnson | 62 | Head | Carpenter | Sweden |
| 40 | Anna D Johnson | 62 | Wife | — | Sweden |
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)