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John Mcmahon — 1920 US Census Record
Linked across censuses1920 United States Federal Census · New York, New York
Our Model Tree links this John Mcmahon across the 1900, 1910 and 1920 US Censuses in New York, New York (XGBoost, ~Confirmed) — first a head (b.~1872), then head of a 4-person household.
Age 48
b. ~1872
Male
Head
Born: Ireland
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | New York, New York |
| Surname | McMahon |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1880 |
| 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 | R |
| Birth Country | Ireland |
| Year of Naturalization | 1890 |
| Birthplace (normalized) | ireland |
| Township / Ward | New York City Manhattan |
| 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.
4 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Mcmahon | Head | — | 48 | ~1872 |
| Michael Mcmahon | Son | — | 26 | ~1894 |
| John Mcmahon | Son | — | 27 | ~1893 |
| Anna Mcmahon | Spouse | — | 48 | ~1872 |
Census Appearances
1900
Kings, New …
Other, age 27
Kings, New York · implied b. ~1873 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | John |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Ireland |
| Birth Month | May |
| Birth Year | 1873 |
| Year of Immigration | 1881 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
New York, …
Head, age 38
New York, New York · implied b. ~1872 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 11 |
| Year of Immigration | 1880 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Fireman |
| Industry | City of N Y |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
New York, …
Head, age 48
New York, New York · implied b. ~1872 — 4 household members
| Surname | McMahon |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1880 |
| 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 | R |
| Birth Country | Ireland |
| Year of Naturalization | 1890 |
| 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 John Mcmahon across 3 US Census years (1900, 1910 and 1920) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John 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 — New York, New York
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1920 US Federal Census — New York, New York
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1222unit:0777)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Mary Camerossi | 35 | Wife | — | Italy |
| 52 | Mildred Camerossi | 19 | Daughter | Feeder | New York |
| 53 | Angelina Camerossi | 10 | Daughter | — | New York |
| 54 | Vincent Galluccio | 9 | Son | — | New York |
| 55 | Carmel Imbuccino | 48 | Head | Laborer | Italy |
| 56 | Carmela Imbuccino | 45 | Wife | — | Italy |
| 57 | Vincent Imbuccino | 25 | Son | Laborer | Italy |
| 58 | Sam Milmet | 30 | Head | Painter | Russia |
| 59 | Ida Milmet | 30 | Wife | — | Russia |
| 60 | Rachel Milmet | 6 | Daughter | — | New York |
| 61 | Paul Milmet | 3 | Son | — | New York |
| 62 | Morris Milmet | 0 | Son | — | New York |
| 63 | James Gripa | 22 | Head | Laborer | New York |
| 64 | Vincenza Gripa | 22 | Wife | — | New York |
| 65 | Joseph Gripa | 1 | Daughter | — | New York |
| 66 | Helen Purvis | 36 | Head | Dressmaker | So. Carolina |
| 67 | Robert Purvis | 10 | Son | — | So. Carolina |
| 68 | Carmelo Merita | 23 | Head | Laborer | Italy |
| 69 | Carmelo Lombardo | 34 | Boarder | Guard | Italy |
| 70 | Jose Merita | 32 | Boarder | Manager | Italy |
| 71 | Anna Andrews | 34 | Head | Caretaker | Russia |
| 72 | Ella Andrews | 14 | Daughter | — | New York |
| 73 | Pantaleone Kolarace | 49 | Head | Shipping Clerk | Italy |
| 74 | Fortunata Kolarace | 39 | Wife | — | Italy |
| 75 | Fredk Nelson | 24 | Head | Driver | New Jersey |
| 76 | Elsie Nelson | 21 | Wife | — | New York |
| 77 | Edna Nelson | 2 | Daughter | — | New York |
| 78 | Fredk Nelson | 0 | Son | — | New York |
| 79 | Joseph Rosso | 48 | Head | Laborer | Italy |
| 80 | Louisa Rosso | 48 | Wife | — | Italy |
| 81 | Gabriel Composto | 36 | Boarder | Eng. Machinist | Italy |
| 82 | Anthony Nikola | 31 | Head | Laborer | Italy |
| 83 | Flora Nikola | 27 | Wife | — | Italy |
| 84 | Caroline Nikola | 6 | Daughter | — | New York |
| 85 | Nicholas Nikola | 4 | Son | — | New York |
| 86 | Amalina Nikola | 1 | Daughter | — | New York |
| 87 | Joseph Carnishaw | 46 | Head | Helper | Italy |
| 88 | Mary Carnishaw | 45 | Wife | — | Italy |
| 89 | Mary Carnishaw | 23 | Daughter | Helper | Italy |
| 90 | Rose Carnishaw | 22 | Daughter | Helper | Italy |
| 91 | Olga Carnishaw | 16 | Daughter | — | Italy |
| 92 | John Carnishaw | 15 | Daughter | — | Italy |
| 93 | Joseph Bergman | 30 | Head | Plumber | New York |
| 94 | Annie Bergman | 23 | Wife | — | New York |
| 95 | Gaston Bergman | 3 | Son | — | New York |
| 96 | Rachel Rosler | 60 | Mother-in-law | — | Galicia |
| 97 | John Mcmahon THIS PERSON | 48 | Head | — | Ireland |
| 98 | Anna Mcmahon | 48 | Wife | — | New Jersey |
| 99 | John Mcmahon | 27 | Son | Truckman | New York |
| 100 | Michael Mcmahon | 26 | Son | Clerk | New York |
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)