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John Mahoney — 1930 US Census Record
Model Tree available1930 United States Federal Census · Will, Illinois
Our Model Tree links this John Mahoney across the 1910, 1920 and 1930 US Censuses in Will, Illinois (XGBoost, ~Confirmed), with identified parents Julia & Julia — first a son (b.~1879), then head of a 7-person household.
Age 51
b. ~1879
Male
Son
Born: Illinois
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Will, Illinois |
| Surname | Mahoney |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 20 |
| Father's Birthplace | New York |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Occupation | Lawyer |
| Industry | Law |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Lawyer |
| Township / Ward | Joliet City |
| Est. Birth Year | ~1879 |
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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mahoney | Daughter | — | 48 | ~1882 |
| Julia Mahoney | Head | — | 51 | ~1879 |
| John Mahoney | Other | — | 13 | ~1917 |
| Julia Mahoney | Other | — | 52 | ~1878 |
| Joseph Mahoney | Other | — | 21 | ~1909 |
| Martha Mahoney | Other | — | 10 | ~1920 |
| John Mahoney | Son | — | 51 | ~1879 |
Census Appearances
1910
Will, Illinois
Son, age 31
Will, Illinois · implied b. ~1879 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | John J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Illinois |
| Years Married | 1 |
| Father's Birthplace | New York |
| Mother's Birthplace | Illinois |
| Occupation | Lawyer |
| Industry | Attorney |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Will, Illinois
Son, age 41
Will, Illinois · implied b. ~1879 — 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 | 41 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| Father's Birthplace | New York |
| Mother's Birthplace | Ireland |
| Occupation | Lawyer |
| Industry | Ex. Electric Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Will, Illinois
Son, age 51
Will, Illinois · implied b. ~1879 — 7 household members
| Surname | Mahoney |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 20 |
| Father's Birthplace | New York |
| Mother's Birthplace | Illinois |
| Occupation | Lawyer |
| Industry | Law |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 (1910, 1920 and 1930) in Will, Illinois, using XGBoost record linkage. Identified parents: mother Julia Mahoney (~0.92 confidence) and mother Julia Mahoney (~0.50 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.71
Mother
Julia Mahoney
b. ~1839
Source mother
● Household
· direct · ~0.92
Mother
Julia Mahoney
b. ~1879
Source mother
● Household
· direct · ~0.5
This person
Anchor record
John Mahoney
Son · 1930 · age 51 · b. ~1879 · Illinois
★ You are viewing this record
Sibling
Margaret Mahoney
Sibling · 1930 · age 48
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 — Will, Illinois
Open full size
1930 US Federal Census — Will, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel568:0170)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eddie Winslow | 56 | Head | None | Rhode Island |
| 2 | James G. Gilbert | 46 | Head | Manager | Missouri |
| 3 | Inez Gilbert | 37 | Wife | Waitress | Missouri |
| 4 | Dorothy Gilbert | 16 | Daughter | None | Colorado |
| 5 | Betty J. Gilbert | 15 | Daughter | Waitress | Colorado |
| 6 | William H. Kelly | 48 | Head | Agent | Illinois |
| 7 | Lucy Kelly | 88 | Mother | None | Illinois |
| 8 | James Kelly | 18 | Son | Clerk | Illinois |
| 9 | Alice Kelly | 52 | Daughter | Pharmacist | Illinois |
| 10 | Howard Gilbert | 12 | Son | None | Colorado |
| 11 | Clara Gilbert | 9 | Daughter | None | Kansas |
| 12 | Jacob Geithman | 58 | Head | Manager | Austria Hungary |
| 13 | Julia Geithman | 57 | Wife | None | Illinois |
| 14 | Frank H. Sampson | 66 | Head | Machinist Helper | Illinois |
| 15 | Minnie Sampson | 69 | Wife | None | Illinois |
| 16 | Evan Isaacson | 65 | Head | Deputy Sheriff | England |
| 17 | Henrietta Isaacson | 49 | Wife | None | Illinois |
| 18 | William Isaacson | 49 | Nephew | Laborer | Illinois |
| 19 | James Hendrickson | 49 | Lodger | Watchman | Pennsylvania |
| 20 | Charles Toy | 40 | Head | Laundryman | China |
| 21 | Frank Lee | 32 | Lodger | Laundryman | China |
| 22 | Chuck Lee | 46 | Lodger | Laundryman | China |
| 23 | Polly H. Massie | 28 | Head | Rooming House | Kentucky |
| 24 | Margaret Wood | 25 | Lodger | None | Illinois |
| 25 | Robert Wood | 29 | Lodger | Laborer | Illinois |
| 26 | Abbie Hallett | 68 | Head | None | New York |
| 27 | Mary Gound | 67 | Head | None | Illinois |
| 28 | Raymond Gound | 30 | Son | Paint Mixer | Illinois |
| 29 | Lawrence Gound | 29 | Son | None | Illinois |
| 30 | Doris Litenberger | 26 | Daughter | Attendant | Illinois |
| 31 | Alex J. Hamilton | 40 | Head | Machinist Hand | Illinois |
| 32 | Ruth Hamilton | 37 | Wife | None | Illinois |
| 33 | Richard Hamilton | 7 | Son | None | Illinois |
| 34 | John Whitemore | 80 | Father-in-law | None | England |
| 35 | Catherine Beeker | 75 | Head | None | Canada English |
| 36 | Maud E. Mitchell | 16 | Daughter | None | Vermont |
| 37 | Ella G. Seaver | 71 | Head | None | Vermont |
| 38 | Maud E. Seaver | 44 | Daughter | Commercial Artist | Vermont |
| 39 | Julia A. Mahoney | 51 | Head | None | Illinois |
| 40 | Margaret M. Mahoney | 48 | Daughter | None | Illinois |
| 41 | John J. Mahoney THIS PERSON | 51 | Son | Lawyer | Illinois |
| 42 | Julia V. Mahoney | 52 | Daughter-in-law | Matron | Illinois |
| 43 | Joseph P. Mahoney | 21 | Grandson | Operator (Bluff) | Illinois |
| 44 | John J. Jr. Mahoney | 13 | Grandson | None | Illinois |
| 45 | Martha Mahoney | 10 | Granddaughter | None | Illinois |
| 46 | Isadore Lewis | 38 | Head | Manager | Ohio |
| 47 | Sue Lewis | 33 | Wife | None | New York |
| 48 | Lois Lewis | 11 | Daughter | None | Illinois |
| 49 | Milton Lewis | 9 | Son | None | Illinois |
| 50 | Lorraine Lewis | 2 | Daughter | None | Illinois |
Related Census Records
Pedigree Summary
John + 1 sibling
Gen 1 · 2 parents
~0.71
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)