JM
John Mahoney — 1930 US Census Record
Model Tree available1930 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this John Mahoney across the 1920, 1930 and 1940 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed), with identified parents James & James — first a son (b.~1907), then head of a 6-person household.
Age 23
b. ~1907
Male
Son
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Philadelphia, Pennsylvania |
| Surname | Mahoney |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Lithographer |
| Industry | Lithographer Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Lithographer |
| Township / Ward | Philadelphia City |
| Est. Birth Year | ~1907 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Eleonore Mahoney | Daughter | — | 27 | ~1903 |
| Mary Mahoney | Daughter | — | 15 | ~1915 |
| James Mahoney | Head | — | 62 | ~1868 |
| John Mahoney | Son | — | 23 | ~1907 |
| James Mahoney | Son | — | 25 | ~1905 |
| Theresa Mahoney | Spouse | — | 52 | ~1878 |
Census Appearances
1920
Philadelphia, Pennsylvania
Son, age 12
Philadelphia, Pennsylvania · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| 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
Son, age 23
Philadelphia, Pennsylvania · implied b. ~1907 — 6 household members
| Surname | Mahoney |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Ireland |
| Occupation | Lithographer |
| Industry | Lithographer Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Head, age 33
Philadelphia-County, Pennsylvania · implied b. ~1907 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahony |
| Given Name | John A |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Occupation | Lithographer |
| Industry | Commercial Art |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 3921 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| 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 John Mahoney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Mahoney (~0.92 confidence) and father James Mahoney (~0.92 confidence) and mother Anna Mahoney (~0.92 confidence) and mother Theresa Mahoney (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Mahoney
b. ~1868
Source father
● Household
· direct · ~0.92
Father
James Mahoney
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Anna Mahoney
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Theresa Mahoney
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mahoney
Son · 1930 · age 23 · b. ~1907 · Pennsylvania
★ You are viewing this record
Sibling
James Mahoney
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleonore Mahoney
Sibling · 1930 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mahoney
Sibling · 1930 · age 15
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:fifteenthcensus00reel2122:0804)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Charles Hoerr | 44 | Head | Weaver | Pennsylvania |
| 52 | Josephine Hoerr | 44 | Wife | — | England |
| 53 | Harry Ogden | 35 | Nephew | Stenographer | Pennsylvania |
| 54 | Vernon C. Sr. Sumwalt | 33 | Head | Manager | Maryland |
| 55 | Hazel H. Sumwalt | 33 | Wife | — | Maryland |
| 56 | Vernon C. Jr. Sumwalt | 6 | Son | — | Maryland |
| 57 | Robert Sumwalt | 5 | Son | — | Maryland |
| 58 | Wilfred Butler | 49 | Head | Superintendent | England |
| 59 | Lethia Butler | 47 | Wife | — | England |
| 60 | Rachel E. Butler | 23 | Daughter | Teacher | England |
| 61 | Charles H. Butler | 18 | Son | Modeler | New Jersey |
| 62 | Robert Eccles | 49 | Head | Knitter | Pennsylvania |
| 63 | Alma Eccles | 48 | Wife | — | Pennsylvania |
| 64 | Gladys Eccles | 11 | Daughter | — | Pennsylvania |
| 65 | Herbert Eccles | 10 | Son | — | Pennsylvania |
| 66 | Malcolm Anderson | 33 | Head | Manager | Canada Eng. |
| 67 | Catherine Anderson | 31 | Wife | — | Pennsylvania |
| 68 | Donald Anderson | 8 | Son | — | Pennsylvania |
| 69 | Jean Anderson | 5 | Daughter | — | Pennsylvania |
| 70 | Sarah Anderson | 60 | Mother | — | Canada Eng. |
| 71 | James E. Mahoney | 62 | Head | Servant | Pennsylvania |
| 72 | Theresa Mahoney | 52 | Wife | Machinist | Ireland |
| 73 | Eleonore G. Mahoney | 27 | Daughter | — | Pennsylvania |
| 74 | James L. Mahoney | 25 | Son | Stenographer | Pennsylvania |
| 75 | John A. Mahoney THIS PERSON | 23 | Son | Lithographer | Pennsylvania |
| 76 | Mary R. Mahoney | 15 | Daughter | Lithographer | Pennsylvania |
| 77 | Walter E. Whitcomb | 49 | Head | — | Pennsylvania |
| 78 | May E. Baldwin | 60 | Sister | Inspector | Pennsylvania |
| 79 | Lottie A. Whitcomb | 50 | Sister | Housekeeper | Pennsylvania |
| 80 | Edward Deitrich | 53 | Head | Proprietor | Pennsylvania |
| 81 | David Hartley | 67 | Brother-in-law | Salesman | Pennsylvania |
| 82 | Elmira H. Liddell | 23 | Daughter | Corporal | Pennsylvania |
| 83 | William H. Liddell | 22 | Son | Bookkeeper | Pennsylvania |
| 84 | Percy Squier | 45 | Head | Orderly | England |
| 85 | Adelaide Squier | 33 | Wife | Manager | Massachusetts |
| 86 | Richard Squier | 14 | Son | — | Pennsylvania |
| 87 | Phyllis Squier | 10 | Daughter | — | Pennsylvania |
| 88 | Frank S. Haring | 49 | Head | — | Pennsylvania |
| 89 | Elizabeth Haring | 52 | Wife | Pill Coater | Pennsylvania |
| 90 | Vernon L. Haring | 13 | Son | — | New Jersey |
| 91 | Mary M. Hull | 76 | Mother-in-law | Installer | Pennsylvania |
| 92 | — | None | — | Retired | — |
| 93 | This Ends The Enumeration Of Block 1312 | None | — | — | — |
| 94 | — | None | — | — | — |
| 95 | — | None | — | — | — |
| 96 | — | None | — | — | — |
| 97 | — | None | — | — | — |
| 98 | — | None | — | — | — |
| 99 | — | None | — | — | — |
| 100 | — | None | — | — | — |
Pedigree Summary
John + 3 siblings
Gen 1 · 4 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)