WM
William Mcmahon — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Hudson, New Jersey
Our Model Tree links this William Mcmahon across the 1920 and 1930 US Censuses in Hudson, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1912), then head of a 8-person household.
Age 18
b. ~1912
Male
Son
Born: New Jersey
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Hudson, New Jersey |
| Surname | McMahon |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Additional Details | |
| Occupation | Worker |
| Industry | Sheet Metal |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Worker |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1912 |
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 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Mary Mcmahon | Spouse | — | 40 | ~1890 |
| Alfred Griffin | Other | — | 27 | ~1903 |
| Robert Mcmahon | Son | — | 15 | ~1915 |
| William Mcmahon | Son | — | 18 | ~1912 |
| Mary Mcmahon | Daughter | — | 11 | ~1919 |
| Michael Mcmahon | Head | — | 50 | ~1880 |
| Walter Mcmahon | Son | — | 5 | ~1925 |
| John Mcmahon | Son | — | 17 | ~1913 |
Census Appearances
1920
Hudson, New …
Son, age 8
Hudson, New Jersey · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Son, age 18
Hudson, New Jersey · implied b. ~1912 — 8 household members
| Surname | McMahon |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | Worker |
| Industry | Sheet Metal |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 William Mcmahon across 2 US Census years (1920 and 1930) in Hudson, New Jersey, using XGBoost record linkage.
Show:
This person
Anchor record
William Mcmahon
Son · 1930 · age 18 · b. ~1912 · New Jersey
★ You are viewing this record
Sibling
John Mcmahon
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mcmahon
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Mcmahon
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mcmahon
Sibling · 1930 · age 11
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 — Hudson, New Jersey
Open full size
1930 US Federal Census — Hudson, New Jersey
Page Contents
50 people indexed on this census page (ia:1930:newjerseycensus00reel1353:0534)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Patrick Curtis | 51 | Head | Laborer | New York |
| 52 | Agnes Curtis | 47 | Wife | — | New Jersey |
| 53 | Helen Curtis | 24 | Daughter | Operator | New York |
| 54 | Richard Curtis | 22 | Son | Comptometer | New Jersey |
| 55 | Vincent Curtis | 17 | Son | Office Boy | New Jersey |
| 56 | Margaret Curtis | 13 | Daughter | — | New Jersey |
| 57 | Lottie Curtis | 10 | Daughter | — | New Jersey |
| 58 | John White | 44 | Bro-in-law | Operator | New Jersey |
| 59 | Joseph White | 17 | Nephew | Office Boy | New Jersey |
| 60 | Edward White | 16 | Nephew | Office Boy | New Jersey |
| 61 | Steve De Stefano | 35 | Head | Engineer | Italy |
| 62 | Lottie De Stefano | 29 | Wife | — | Poland |
| 63 | George De Stefano | 12 | Son | — | New Jersey |
| 64 | Antoinette De Stefano | 10 | Daughter | — | New Jersey |
| 65 | Clara De Stefano | 6 | Daughter | — | New Jersey |
| 66 | Anthony Rotondi | 25 | Boarder | Barber | Italy |
| 67 | William Dreimuller | 29 | Head | Chauffeur | New Jersey |
| 68 | Marion Dreimuller | 24 | Wife | — | New York |
| 69 | William Jr. Dreimuller | 3 | Son | — | New Jersey |
| 70 | Shirley Dreimuller | 1 | Daughter | — | New Jersey |
| 71 | John J. Kelly | 51 | Head | Broker | New Jersey |
| 72 | Mary A. Kelly | 50 | Wife | — | Irish Free State |
| 73 | John A. Kelly | 21 | Son | Clerk | New Jersey |
| 74 | Frank C. Kelly | 19 | Son | Clerk | New Jersey |
| 75 | Margaret Kelly | 15 | Daughter | — | New Jersey |
| 76 | Michael Mcmahon | 50 | Head | Inspector | New Jersey |
| 77 | Mary H. Mcmahon | 40 | Wife | — | New Jersey |
| 78 | William Mcmahon THIS PERSON | 18 | Son | Worker | New Jersey |
| 79 | John Mcmahon | 17 | Son | Clerk | New Jersey |
| 80 | Robert Mcmahon | 15 | Son | — | New Jersey |
| 81 | Mary Mcmahon | 11 | Daughter | — | New Jersey |
| 82 | Walter Mcmahon | 5 | Son | — | New Jersey |
| 83 | Alfred Griffin | 27 | Bro-in-law | Utility Man | New Jersey |
| 84 | Nellie J. Bloom | 55 | Head | — | Massachusetts |
| 85 | Nelson R. Bloom | 33 | Son | Helper | New Jersey |
| 86 | Edmund Keister | 56 | Head | Carpenter | New Jersey |
| 87 | Margaret Keister | 34 | Wife | Checker | New York |
| 88 | Louris Keister | 16 | Daughter | Waitress | New Jersey |
| 89 | Ruth Keister | 14 | Daughter | — | New Jersey |
| 90 | Agnes Keister | 12 | Daughter | — | New Jersey |
| 91 | Caroline Keister | 6 | Daughter | — | New Jersey |
| 92 | Philip Holland | 64 | Head | Foreman | New Jersey |
| 93 | Nellie F. Holland | 60 | Wife | — | New York |
| 94 | William H. Simmons | 68 | Head | Engineer | New York |
| 95 | Lily R. Simmons | 56 | Wife | — | New York |
| 96 | Howard W. Simmons | 24 | Son | Book Keeper | New Jersey |
| 97 | Elmer E. Simmons | 17 | Son | — | New Jersey |
| 98 | Alice Holland | 25 | Step-daughter | Technician | New Jersey |
| 99 | — | None | — | — | — |
| 100 | — | None | — | — | — |
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)