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Helen Mcdonald — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kings-County, New York
Our Model Tree links this Helen Mcdonald across the 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a daughter (b.~1911), then head of a 11-person household.
Age 29
b. ~1911
Female
Daughter
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | McDonald |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | New York C |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | Telephone Operator |
| Industry | PW |
| Class of Worker | 299 |
| Hours Worked | 64 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Telephone Operator |
| Township / Ward | New York C |
| Est. Birth Year | ~1911 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| William La Rocca | Son | — | 49 | ~1891 |
| Michael La Rocca | Son | — | 37 | ~1903 |
| Ronald Mcdonald | Son | — | ~1940 | |
| John Lubocca | Son | — | 37 | ~1903 |
| Frank La Rocca | Son | — | 43 | ~1897 |
| Helen Mcdonald | Daughter | — | 29 | ~1911 |
| Margaret La Rocca | Daughter | — | 22 | ~1918 |
| James La Rocca | Son | — | 33 | ~1907 |
| Henry La Rocca | Son | — | 35 | ~1905 |
| Gerard Mcdonald | Son | — | 2 | ~1938 |
| Giovanna La Rocca | Head | — | 69 | ~1871 |
Census Appearances
1930
Kings, New …
Daughter, age 18
Kings, New York · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | Irish Free State |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Daughter, age 29
Kings-County, New York · implied b. ~1911 — 11 household members
| Surname | McDonald |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | New York C |
| 1935 Residence (County) | Kings |
| Occupation | Telephone Operator |
| Industry | PW |
| Class of Worker | 299 |
| Hours Worked | 64 |
| Highest Grade | No 8 |
| 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 Helen Mcdonald across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Helen Mcdonald
Daughter · 1940 · age 29 · b. ~1911 · New York
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Sibling
Margaret La Rocca
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Michael La Rocca
Sibling · 1940 · age 37
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank La Rocca
Sibling · 1940 · age 43
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerard Mcdonald
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ronald Mcdonald
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William La Rocca
Sibling · 1940 · age 49
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Lubocca
Sibling · 1940 · age 37
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James La Rocca
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henry La Rocca
Sibling · 1940 · age 35
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 — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02577-00241)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Rose Price | 34 | Daughter | Teacher | New York |
| 42 | Sam Corey | 50 | Head | Bakery Helper | Syria |
| 43 | Luxe Corey | 44 | Wife | — | Syria |
| 44 | Ralph Corey | 27 | Son | Salesman | New York |
| 45 | Eva Corey | 23 | Daughter | Clerical | New York |
| 46 | Murray Corey | 21 | Son | Mechanic | New York |
| 47 | Marion Corey | 21 | Daughter | Manager | New York |
| 48 | Nash Visconti | 36 | Head | Painting | New York |
| 49 | Anna Visconti | 30 | Wife | — | New York |
| 50 | Beatrice Visconti | 11 | Daughter | — | New York |
| 51 | John Visconti | 9 | Son | — | New York |
| 52 | Thomas Visconti | 7 | Son | — | New York |
| 53 | Angelo Fraconte | 38 | Head | Bartender | New York |
| 54 | Rose Fraconte | 36 | Wife | — | New York |
| 55 | Ella Fraconte | 13 | Daughter | — | New York |
| 56 | Frank Fraconte | 10 | Son | — | New York |
| 57 | Ciro Agrillo | 62 | Head | Musician | Italy |
| 58 | Carmela Agrillo | 58 | Wife | — | Italy |
| 59 | George Karambelas | 65 | Head | Peanut Bender | Greece |
| 60 | Joseph Raduazzo | 35 | Head | Helper | New York |
| 61 | Angelina Raduazzo | 32 | Wife | — | New York |
| 62 | Lucille Raduazzo | 10 | Daughter | — | New York |
| 63 | Rosemarie Raduazzo | 4 | Daughter | — | New York |
| 64 | Dorothy Raduazzo | 0 | Daughter | — | New York |
| 65 | Giovanna La Rocca | 69 | Head | — | Italy |
| 66 | William La Rocca | 49 | Son | Labor Factory | New York |
| 67 | Frank La Rocca | 43 | Son | Labor Factory | New York |
| 68 | Michael La Rocca | 37 | Son | Machine Factory | New York |
| 69 | Henry (X) La Rocca | 35 | Son | Labor General | New York |
| 70 | James La Rocca | 33 | Son | Machine Repair | New York |
| 71 | Margaret La Rocca | 22 | Daughter | Inspect | New York |
| 72 | Helen Mcdonald THIS PERSON | 29 | Daughter | Telephone Operator | New York |
| 73 | Gerard Mcdonald | 2 | Son | — | New York |
| 74 | Ronald Mcdonald | 0 | Son | — | New York |
| 75 | John Lubocca | 37 | Son | Labor General | New York |
| 76 | Frank Fiore | 48 | Head | Barber Shop | Italy |
| 77 | Philomena Fiore | 44 | Wife | — | New York |
| 78 | Vincent Fiore | 20 | Son | Shoe Factory | New York |
| 79 | Alfred Fiore | 22 | Son | Chauffeur | New York |
| 80 | Pat Brennan | 55 | Roomer | Elevator Operator | 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)