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Margaret Mcmahon — 1930 US Census Record
Model Tree available1930 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this Margaret Mcmahon across the 1910, 1920 and 1930 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed), with identified parents Bernard & Jas — first a daughter (b.~1910), then head of a 6-person household.
Age 20
b. ~1910
Female
Daughter
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Philadelphia, Pennsylvania |
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Philadelphia City |
| Est. Birth Year | ~1910 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Anna Mcmahon | Head | — | 51 | ~1879 |
| Albert Mcmahon | Son | — | 17 | ~1913 |
| Matthew Mcmahon | Son | — | 21 | ~1909 |
| Veronica Mcmahon | Daughter | — | 18 | ~1912 |
| Margaret Mcmahon | Daughter | — | 20 | ~1910 |
| John Mcmahon | Son | — | 20 | ~1910 |
Census Appearances
1910
Philadelphia, Pennsylvania
Daughter, age
Philadelphia, Pennsylvania · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Philadelphia, Pennsylvania
Daughter, age 9
Philadelphia, Pennsylvania · implied b. ~1911 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Philadelphia, Pennsylvania
Daughter, age 20
Philadelphia, Pennsylvania · implied b. ~1910 — 6 household members
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Margaret Mcmahon across 3 US Census years (1910, 1920 and 1930) in Philadelphia, Pennsylvania, using XGBoost record linkage. Identified parents: father Bernard Mcmahon (~0.92 confidence) and father Jas Mcmahon (~0.92 confidence) and mother Anna Mcmahon (~0.92 confidence) and mother Minnie Mcmahon (~0.92 confidence) and mother Nora Mcmahon (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Bernard Mcmahon
b. ~1879
Source father
● Household
· direct · ~0.92
Father
Jas Mcmahon
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Anna Mcmahon
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
Minnie Mcmahon
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Nora Mcmahon
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Mcmahon
Daughter · 1930 · age 20 · b. ~1910 · Pennsylvania
★ You are viewing this record
Sibling
Matthew Mcmahon
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Veronica Mcmahon
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mcmahon
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Mcmahon
Sibling · 1930 · age 17
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 — Philadelphia, Pennsylvania
Open full size
1930 US Federal Census — Philadelphia, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel2130rs:0192)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph Marsico | 53 | Head | — | Italy |
| 2 | Rose Marsico | 51 | Wife | — | Italy |
| 3 | Frank Marsico | 22 | Son | Carpenter | Pennsylvania |
| 4 | Vincent Marsico | 15 | Son | Clerk | Pennsylvania |
| 5 | Florence Marsico | 12 | Daughter | — | Pennsylvania |
| 6 | Jane A Mcneill | 88 | Head | — | Pennsylvania |
| 7 | Rose R Mcneill | 82 | Sister | — | Pennsylvania |
| 8 | Agnes V Mcneill | 72 | Sister | — | Pennsylvania |
| 9 | David O'Keefe | 62 | Head | Glass Cutter | United States |
| 10 | Catherine O'Keefe | 25 | Daughter | Clerk | Pennsylvania |
| 11 | Edward O'Keefe | 21 | Son | Salesman | Pennsylvania |
| 12 | Peter Crowe | 55 | Head | — | Pennsylvania |
| 13 | Kate J Crowe | 52 | Wife | — | Ireland |
| 14 | Viola L Bastian | 53 | Head | — | Delaware |
| 15 | Enoch Shockley | 48 | Head | Machinist | Scotland |
| 16 | Mary Shockley | 44 | Wife | — | Scotland |
| 17 | Enoch Shockley | 5 | Son | — | United States |
| 18 | Josephine Jamison | 75 | Mother | — | Pennsylvania |
| 19 | James Dunney | 50 | Head | Mail Carrier | Ireland |
| 20 | Agnes Dunney | 45 | Sister | Dressmaker | Ireland |
| 21 | Catherine Dunney | 43 | Sister | — | Ireland |
| 22 | Anna Mcmahon | 51 | Head | — | Ireland |
| 23 | Matthew Mcmahon | 21 | Son | — | Pennsylvania |
| 24 | John Mcmahon | 20 | Son | Truck Driver | Pennsylvania |
| 25 | Margaret Mcmahon THIS PERSON | 20 | Daughter | — | Pennsylvania |
| 26 | Veronica Mcmahon | 18 | Daughter | Lamp Shade | Pennsylvania |
| 27 | Albert Mcmahon | 17 | Son | — | Pennsylvania |
| 28 | William Leitch | 54 | Head | Manager | Ireland |
| 29 | Elizabeth Leitch | 55 | Wife | — | Ireland |
| 30 | Beatrice Leitch | 24 | Daughter | Stenographer | New York |
| 31 | John Leitch | 23 | Son | Clerk | New York |
| 32 | William Leitch | 21 | Son | Clerk | New York |
| 33 | Margaret J Leitch | 18 | Daughter | — | New York |
| 34 | Claude Smith | 27 | Head | Waiter | United States |
| 35 | Ann Smith | 5 | Daughter | — | Pennsylvania |
| 36 | William Landis | 54 | Head | Cabinet Maker | Pennsylvania |
| 37 | Elizabeth Landis | 44 | Wife | — | Pennsylvania |
| 38 | Alonza Ahern | 47 | Head | Boilermaker | Ireland |
| 39 | Nellie Ahern | 50 | Wife | — | Ireland |
| 40 | Mary Ahern | 18 | Daughter | Stenographer | Pennsylvania |
| 41 | John Ahern | 17 | Son | Salesman | Pennsylvania |
| 42 | William Jr Ahern | 15 | Son | — | Pennsylvania |
| 43 | Matthew Ahern | 13 | Son | — | Pennsylvania |
| 44 | Raphael Di Filippo | 57 | Head | Tailor | Italy |
| 45 | Rose Di Filippo | 48 | Wife | — | Italy |
| 46 | Filomena Di Filippo | 23 | Daughter | Clerk | Pennsylvania |
| 47 | Louis Di Filippo | 21 | Son | Electrician | Pennsylvania |
| 48 | Catherine Di Filippo | 19 | Daughter | Laborer | Pennsylvania |
| 49 | Raphael Di Filippo | 17 | Daughter | Clerk | Pennsylvania |
| 50 | Paul Di Filippo | 13 | Son | — | Pennsylvania |
Pedigree Summary
Margaret + 4 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)