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Mary Mcmahon — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Bronx, New York
Our Model Tree links this Mary Mcmahon across the 1920, 1930 and 1940 US Censuses in Bronx, New York (XGBoost, ~Confirmed) — first a head (b.~1872), then head of a 5-person household.
Age 48
b. ~1872
Female
Head
Born: Ireland
Widowed
1920 Census Record Details
| Census Year | 1920 |
| Location | Bronx, New York |
| Surname | McMahon |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1890 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | New York City Bronx Borough |
| Est. Birth Year | ~1872 |
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.
5 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Anna Mcmahon | Daughter | — | 19 | ~1901 |
| Margaret Mcmahon | Daughter | — | 17 | ~1903 |
| Dorothy Mcmahon | Daughter | — | 11 | ~1909 |
| Mary Mcmahon | Head | — | 48 | ~1872 |
| Loretta Riley | Other | — | 20 | ~1900 |
Census Appearances
1920
Bronx, New …
Head, age 48
Bronx, New York · implied b. ~1872 — 5 household members
| Surname | McMahon |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1890 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Bronx, New …
Head, age 60
Bronx, New York · implied b. ~1870 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Mara |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Naturalization Status | Alien |
| Year of Immigration | 1902 |
| Age at First Marriage | 30 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Engraver |
| Industry | Printing |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 55 |
| Radio Set | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Westchester-County, New …
Other, age 70
Westchester-County, New York · implied b. ~1870 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Mary |
| Relationship to Head | mother |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | Port Chester |
| 1935 Residence (County) | Westchester |
| Naturalization Status | Naturalized |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Mcmahon across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Mcmahon
Head · 1920 · age 48 · b. ~1872 · New York
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Bronx, New York
Open full size
1920 US Federal Census — Bronx, New York
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1134unit:0057)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Jacob Leff | 29 | Son | Salesman | Galicia |
| 52 | Helen Leff | 6 | Grand daughter | — | New York |
| 53 | Benjamin Michaelson | 29 | Head | Salesman | Russia |
| 54 | Rose Michaelson | 30 | Wife | — | Galicia |
| 55 | Ruth Michaelson | 2 | Daughter | — | New York |
| 56 | Hannie Rude | 53 | Head | — | Russia |
| 57 | Paul Rude | 25 | Son | Manager | New York |
| 58 | Fred Gubransky | 40 | Head | Tailor | Russia |
| 59 | Hanna Gubransky | 36 | Wife | — | New York |
| 60 | Mildred Gubransky | 12 | Daughter | — | New York |
| 61 | Lester Gubransky | 10 | Son | — | New York |
| 62 | Sidney Gubransky | 3 | Son | — | New York |
| 63 | George Brandman | 41 | Head | Manager | Russia |
| 64 | Elsie Brandman | 34 | Wife | — | New York |
| 65 | Paul Brandman | 2 | Son | — | New York |
| 66 | Herman Hammer | 49 | Head | Tailor | Russia |
| 67 | Leah Hammer | 46 | Wife | — | Russia |
| 68 | Joseph Hammer | 28 | Son | Salesman | New York |
| 69 | Benjamin Hammer | 26 | Son | Salesman | New York |
| 70 | Jack Hammer | 19 | Son | Clerk | New York |
| 71 | Bessie Hammer | 15 | Daughter | Stenographer | New York |
| 72 | Nathan Hammer | 12 | Son | — | New York |
| 73 | Mary Mcmahon THIS PERSON | 48 | Head | — | Ireland |
| 74 | Anna Mcmahon | 19 | Daughter | — | New Jersey |
| 75 | Margaret Mcmahon | 17 | Daughter | — | New York |
| 76 | Dorothy Mcmahon | 11 | Daughter | — | New York |
| 77 | Loretta Riley | 20 | Niece | — | New Jersey |
| 78 | William Mcbride | 28 | Head | — | Ohio |
| 79 | Dorothy Mcbride | 20 | Wife | — | New York |
| 80 | Lester Mcbride | 4 | Daughter | — | New York |
| 81 | Edith Mcbride | 2 | Daughter | — | New York |
| 82 | Mary Cassa | 50 | Maid | Servant | Italy |
| 83 | Margaret Duffy | 60 | Head | — | Ireland |
| 84 | Julia Duffy | 40 | Daughter | — | New York |
| 85 | Mary Duffy | 38 | Daughter | — | New York |
| 86 | Anna Duffy | 36 | Daughter | — | New York |
| 87 | Maurice Duffy | 31 | Son | — | New York |
| 88 | Agatha Duffy | 27 | Daughter | — | New York |
| 89 | George F Armstrong | 57 | Head | — | Ireland |
| 90 | Rebecca Armstrong | 46 | Wife | — | Ireland |
| 91 | Rebecca M Armstrong | 23 | Daughter | — | New York |
| 92 | Arthur Armstrong | 19 | Son | — | New York |
| 93 | Ella Yates | 71 | Head | — | New York |
| 94 | Della Yates | 45 | Daughter | — | New York |
| 95 | Henry Yates | 40 | Son | — | New York |
| 96 | Adda Yates | 36 | Daughter | — | New York |
| 97 | Marie Bahler | 71 | Head | — | Germany |
| 98 | Emma A Bahler | 42 | Daughter | — | New York |
| 99 | Louis Rosen | 46 | Head | Manager | Roumania |
| 100 | Bessie Rosen | 42 | Wife | — | Russia |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)