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Mary Mcmahon — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this Mary Mcmahon across the 1900, 1910 and 1920 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1865), then head of a 3-person household.
Age 55
b. ~1865
Female
Spouse
Born: Ireland
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Philadelphia, Pennsylvania |
| Surname | McMahon |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1888 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1893 |
| Birthplace (normalized) | ireland |
| Township / Ward | City Of Philadelphia |
| Est. Birth Year | ~1865 |
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.
3 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Bernard Mcmahon | Head | — | 55 | ~1865 |
| Thomas Mcmahon | Son | — | 26 | ~1894 |
| Mary Mcmahon | Spouse | — | 55 | ~1865 |
Census Appearances
1900
Philadelphia, Pennsylvania
Spouse, age 34
Philadelphia, Pennsylvania · implied b. ~1866 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Ireland |
| Birth Month | Jan |
| Birth Year | 1866 |
| Year of Immigration | 1882 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Philadelphia, Pennsylvania
Spouse, age 45
Philadelphia, Pennsylvania · implied b. ~1865 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 25 |
| Children Born | 10 |
| Children Living | 4 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Philadelphia, Pennsylvania
Spouse, age 55
Philadelphia, Pennsylvania · implied b. ~1865 — 3 household members
| Surname | McMahon |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1888 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1893 |
| 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 (1900, 1910 and 1920) in Philadelphia, Pennsylvania, using XGBoost record linkage.
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This person
Anchor record
Mary Mcmahon
Spouse · 1920 · age 55 · b. ~1865 · 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:1920:14thcensusofpopu1633unit:0067)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Loretta Sheehan | 24 | daughter | Freight Clerk | Pennsylvania |
| 52 | Richard Sheehan | 22 | son | Rate Clerk | Pennsylvania |
| 53 | Frances Sheehan | 19 | daughter | Cashier | Pennsylvania |
| 54 | Catherine Sheehan | 17 | daughter | Typewriter | Pennsylvania |
| 55 | Bernard Mcmahon | 55 | head | Teamster | Indiana |
| 56 | Mary Mcmahon THIS PERSON | 55 | wife | None | Ireland |
| 57 | Thomas Mcmahon | 26 | son | Brakeman | Pennsylvania |
| 58 | Michael J. Lacy | 37 | head | Foreman | Pennsylvania |
| 59 | Sarah H. Lacy | 28 | wife | None | Pennsylvania |
| 60 | Walter J. Cannon | 22 | head | Wheelwright | Pennsylvania |
| 61 | Agnes Cannon | 19 | wife | None | Pennsylvania |
| 62 | Walter J. Cannon | 0 | son | — | Pennsylvania |
| 63 | Marie Lacy | 1 | daughter | — | Pennsylvania |
| 64 | Frances Stern | 89 | head | None | Germany |
| 65 | Agnes J. Stern | 46 | daughter | None | Indiana |
| 66 | Charles R. Stern | 19 | son | Draftsman | Pennsylvania |
| 67 | James Lamb | 50 | boarder | Foreman | Pennsylvania |
| 68 | May F. Wonderly | 39 | head | None | Pennsylvania |
| 69 | Gladys G. Wonderly | 17 | daughter | Stenographer | Pennsylvania |
| 70 | Warner Warner | 30 | head | Chauffeur | New York |
| 71 | Warner Jr. Warner | 5 | son | — | Pennsylvania |
| 72 | Hazel Warner | 3 | daughter | — | Pennsylvania |
| 73 | Maurice Schuetz | 36 | brother | Bricklayer | New York |
| 74 | Philip P. (Mute) Gorman | 44 | boarder | Cutter | Pennsylvania |
| 75 | William G. Rogers | 37 | head | Chauffeur | Pennsylvania |
| 76 | Margaret L. Rogers | 40 | wife | None | Virginia |
| 77 | Arthur R. Rogers | 16 | son | Draftsman | Philadelphia |
| 78 | Mary A. Roach | 40 | head | Trained Nurse | England |
| 79 | Winifred J. Roach | 36 | sister | Inspector | England |
| 80 | Caspar Muller | 68 | head | Cake Baker | Germany |
| 81 | Anna Muller | 48 | daughter | None | Pennsylvania |
| 82 | Joseph Bates | 56 | boarder | Engineer | England |
| 83 | Jacob E. Wheeler | 46 | boarder | Chauffeur | Pennsylvania |
| 84 | Alice B. Clokey | 52 | head | None | Virginia |
| 85 | Emory O. Clokey | 32 | son | Motorman | Washington D.C. |
| 86 | Daniel Clokey | 27 | son | Storekeeper | Virginia |
| 87 | Mary Riley | 54 | head | None | Ireland |
| 88 | Edward Riley | 8 | grandson | — | Pennsylvania |
| 89 | Frank G. Dross | 51 | lodger | Blacksmith | Pennsylvania |
| 90 | Lena Reichert | 45 | lodger | Electric Work | Pennsylvania |
| 91 | Herbert E. Chandler | 33 | head | Printer | Pennsylvania |
| 92 | Agnes R. Chandler | 33 | wife | None | Pennsylvania |
| 93 | Regina Chandler | 7 | daughter | — | Pennsylvania |
| 94 | Anna E. Alcott | 75 | mother-in-law | Landlady | Pennsylvania |
| 95 | Anna Alcott | 10 | niece | — | Pennsylvania |
| 96 | Joseph Alcott | 12 | nephew | — | Pennsylvania |
| 97 | Teresa Murray | 75 | mother-in-law | None | Ireland |
| 98 | John J. Gallagher | 57 | head | Engineer | Ireland |
| 99 | Catherine Gallagher | 49 | wife | None | Ireland |
| 100 | John J. Jr. Gallagher | 22 | son | Assorter | 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)