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James Mcmahon — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this James Mcmahon across the 1900, 1910 and 1920 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1859), then head of a 8-person household.
Age 61
b. ~1859
Male
Head
Born: Ireland
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Philadelphia, Pennsylvania |
| Surname | McMahon |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1881 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Iron Worker |
| Industry | Foundry |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Ireland |
| Year of Naturalization | 1904 |
| Birthplace (normalized) | ireland |
| Occupation | Iron Worker |
| Township / Ward | Philadelphia City |
| Est. Birth Year | ~1859 |
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 1920 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Rosanna Mcmahon | Daughter | — | 15 | ~1905 |
| Mary Mcmahon | Daughter | — | 20 | ~1900 |
| James Mcmahon | Head | — | 61 | ~1859 |
| Michael Mcmahon | Son | — | 24 | ~1896 |
| Frank Mcmahon | Son | — | 18 | ~1902 |
| James Mcmahon | Son | — | 27 | ~1893 |
| Thomas Mcmahon | Son | — | 23 | ~1897 |
| Mary Mcmahon | Spouse | — | 52 | ~1868 |
Census Appearances
1900
Philadelphia, Pennsylvania
Other, age 39
Philadelphia, Pennsylvania · implied b. ~1861 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | James |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Single |
| Birthplace | Ireland |
| Birth Month | Sep |
| Birth Year | 1861 |
| Year of Immigration | 1886 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Day Labor |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Philadelphia, Pennsylvania
Other, age 50
Philadelphia, Pennsylvania · implied b. ~1860 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | James |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Single |
| Birthplace | Ireland |
| Children Living | 1880 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Teamster |
| Industry | Express Co |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Philadelphia, Pennsylvania
Head, age 61
Philadelphia, Pennsylvania · implied b. ~1859 — 8 household members
| Surname | McMahon |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1881 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Iron Worker |
| Industry | Foundry |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Ireland |
| Year of Naturalization | 1904 |
| 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 James Mcmahon across 3 US Census years (1900, 1910 and 1920) in Philadelphia, Pennsylvania, using XGBoost record linkage.
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This person
Anchor record
James Mcmahon
Head · 1920 · age 61 · b. ~1859 · Pennsylvania
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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 — Philadelphia, Pennsylvania
Open full size
1920 US Federal Census — Philadelphia, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1643unit:0409)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Margaret Sweeney | 36 | Servant | Servant | Ireland |
| 52 | Julian Krauser | 36 | Head | Merchant | Russia |
| 53 | Aimee Krauser | 36 | Wife | — | Russia |
| 54 | Rose Krauser | 14 | Daughter | — | Pennsylvania |
| 55 | Elsie Krauser | 12 | Daughter | — | Pennsylvania |
| 56 | Jessie Krauser | 10 | Daughter | — | Pennsylvania |
| 57 | Martin Krauser | 3 | Son | — | Pennsylvania |
| 58 | Morris Fischman | 27 | Head | — | Russia |
| 59 | Dora Fischman | 27 | Wife | Merchant | Pennsylvania |
| 60 | Myron Fischman | 2 | Son | — | Pennsylvania |
| 61 | Lenore Fischman | 0 | Daughter | — | Pennsylvania |
| 62 | Lena Darity | 18 | Servant | Servant | Germany |
| 63 | Samuel Cherrin | 33 | Head | Dealer | Russia |
| 64 | Rose Cherrin | 29 | Wife | — | Russia |
| 65 | Zelda Cherrin | 10 | Daughter | — | Pennsylvania |
| 66 | Henrietta Cherrin | 7 | Daughter | — | Pennsylvania |
| 67 | Ezra Lichtenbaum | 58 | Boarder | — | Russia |
| 68 | Samuel Steinhof | 30 | Head | Clerk | Pennsylvania |
| 69 | Blanch Steinhof | 30 | Wife | — | Pennsylvania |
| 70 | Blanch Steinhof | 2 | Daughter | — | Pennsylvania |
| 71 | Morris Miller | 40 | Head | Mfg | Russia |
| 72 | Sarah Miller | 40 | Wife | — | Russia |
| 73 | Esther Miller | 21 | Daughter | Clerk | Russia |
| 74 | Harry Miller | 18 | Son | Clerk | Pennsylvania |
| 75 | Manuel Miller | 16 | Son | Shipper | Pennsylvania |
| 76 | Isadore Miller | 8 | Son | — | Pennsylvania |
| 77 | Leon Siebner | 38 | Head | Merchant | Austria |
| 78 | Lena Siebner | 30 | Wife | — | Russia |
| 79 | Albert Siebner | 1 | Son | — | Austria |
| 80 | Sadie Feldman | 23 | Servant | Servant | Hungary |
| 81 | James Mcmahon THIS PERSON | 61 | Head | Iron Worker | Ireland |
| 82 | Mary Mcmahon | 52 | Wife | — | England |
| 83 | James Mcmahon | 27 | Son | Clerk | Pennsylvania |
| 84 | Michael Mcmahon | 24 | Son | Laborer | Pennsylvania |
| 85 | Thomas Mcmahon | 23 | Son | Salesman | Pennsylvania |
| 86 | Mary Mcmahon | 20 | Daughter | Packer | Pennsylvania |
| 87 | Frank Mcmahon | 18 | Son | Iron Worker | Pennsylvania |
| 88 | Rosanna Mcmahon | 15 | Daughter | Inspector | Pennsylvania |
| 89 | Simon Tischman | 35 | Head | Mfg | Russia |
| 90 | Mary Tischman | 29 | Wife | — | Russia |
| 91 | Eva Tischman | 8 | Daughter | — | Pennsylvania |
| 92 | Leona Tischman | 4 | Daughter | — | Pennsylvania |
| 93 | Charles Rademan | 49 | Head | Merchant | Russia |
| 94 | Annie Rademan | 43 | Wife | — | Russia |
| 95 | Goldie Rademan | 19 | Daughter | Music Teacher | Pennsylvania |
| 96 | Harry Rademan | 14 | Son | — | Pennsylvania |
| 97 | George Kastern | 46 | Head | Civil Engineer | Pennsylvania |
| 98 | Ellie Kastern | 45 | Wife | — | Pennsylvania |
| 99 | Arnold Kastern | 13 | Son | — | Pennsylvania |
| 100 | Frank Kastern | 82 | Father | Clerk | Pennsylvania |
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)