MH
Mary Hennessy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Kings, New York
Our Model Tree links this Mary Hennessy across the 1930 and 1940 US Censuses in Kings, New York (XGBoost, ~Confirmed) — first a daughter (b.~1919), then head of a 6-person household.
Age 11
b. ~1919
Female
Daughter
Born: New York
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Kings, New York |
| Surname | Hennessy |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Township / Ward | Brooklyn Borough |
| Est. Birth Year | ~1919 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Rose Hennessy | Spouse | — | 40 | ~1890 |
| Robert Hennessy | Head | — | 41 | ~1889 |
| James Hennessy | Son | — | 8 | ~1922 |
| Mary Hennessy | Daughter | — | 11 | ~1919 |
| Robert Hennessy | Son | — | 9 | ~1921 |
| William Hennessy | Son | — | 6 | ~1924 |
Census Appearances
1930
Kings, New …
Daughter, age 11
Kings, New York · implied b. ~1919 — 6 household members
| Surname | Hennessy |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Daughter, age 21
Kings-County, New York · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Boro Brooklyn |
| 1935 Residence (County) | Kings |
| Occupation | Salesgirl |
| Industry | 5 & 10 Cent Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | H 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 Hennessy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hennessy
Daughter · 1930 · age 11 · b. ~1919 · New York
★ You are viewing this record
Sibling
Robert Hennessy
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Hennessy
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Hennessy
Sibling · 1930 · age 8
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
1930 US Federal Census — Kings, New York
Open full size
1930 US Federal Census — Kings, New York
Page Contents
50 people indexed on this census page (ia:1930:newyorkcensus00reel1506rs:0699)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Madeline Kane | 9 | daughter | None | New York |
| 52 | Margaret Kane | 9 | daughter | None | New York |
| 53 | Catherine Lowery | 52 | Head | Clerk | New York |
| 54 | Walter Lowery | 27 | Son | Clerk | New York |
| 55 | Mary Duffy | 28 | sister | None | New York |
| 56 | Mary J. Dunworth | 55 | Head | None | New York |
| 57 | George A. Dunworth | 27 | son | Salesman | New York |
| 58 | Mary J. Dunworth | 26 | daughter | Stenographer | New York |
| 59 | William Kealing | 32 | Head | Helper | New York |
| 60 | Margaret Kealing | 28 | wife | None | New York |
| 61 | Margaret Kealing | 3 | daughter | None | New York |
| 62 | William J. Kealing | 2 | son | None | New York |
| 63 | Frank Thompson | 44 | Head | Chauffeur | New York |
| 64 | Elizabeth Thompson | 44 | wife | None | North Ireland |
| 65 | Walter Thompson | 19 | son | Clerk | New York |
| 66 | Gerard Thompson | 8 | son | None | New York |
| 67 | Sebastian Peltz | 43 | Head | Operator | Poland |
| 68 | Margaret Peltz | 40 | wife | None | Poland |
| 69 | Eugene Peltz | 21 | son | Clerk | New York |
| 70 | Walter Peltz | 22 | son | Chauffeur | New York |
| 71 | Loretta Peltz | 19 | daughter | Stenographer | New York |
| 72 | Florence Peltz | 13 | daughter | None | New York |
| 73 | Robert J. Hennessy | 41 | Head | Route Man | New York |
| 74 | Rose Hennessy | 40 | wife | None | New York |
| 75 | Mary Hennessy THIS PERSON | 11 | daughter | None | New York |
| 76 | Robert P. Hennessy | 9 | son | None | New York |
| 77 | James Hennessy | 8 | son | None | New York |
| 78 | William Hennessy | 6 | son | None | New York |
| 79 | Allan W. Seale | 49 | Head | Equipment Inspector | Barbados |
| 80 | Lulu A. Seale | 40 | wife | Chauffeur | New York |
| 81 | Charles E. Seale | 17 | son | Salesman | New York |
| 82 | Eugene Kane | 31 | Head | Shipping Clerk | Canada English |
| 83 | Marie Kane | 29 | wife | None | Canada English |
| 84 | Marie Kane | 8 | daughter | None | Canada English |
| 85 | Urban Kane | 6 | son | None | Canada English |
| 86 | Margaret Kane | 4 | daughter | None | Massachusetts |
| 87 | James Gray | 32 | Head | Helper | England |
| 88 | Catherine Gray | 27 | wife | None | New York |
| 89 | James Jr. Gray | 3 | son | None | New York |
| 90 | William Gray | 34 | Brother-in-law | Laborer | New York |
| 91 | Jacob Timmers | 33 | Head | Waiter | Holland |
| 92 | Inge Timmers | 35 | wife | None | Sweden |
| 93 | Raymond Timmers | 8 | son | None | New York |
| 94 | William Gibson | 25 | Head | Book Keeper | New York |
| 95 | Agnes Gibson | 22 | wife | None | New York |
| 96 | William Jr. Gibson | 3 | son | None | New York |
| 97 | Joan Gibson | 0 | daughter | None | New York |
| 98 | James Parker | 30 | Head | Chauffeur | Florida |
| 99 | Helen Parker | 24 | wife | None | New Jersey |
| 100 | James Jr. Parker | 1 | son | None | New York |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)