JM
James Mahoney — 1930 US Census Record
Model Tree available1930 United States Federal Census · Essex, Massachusetts
Our Model Tree links this James Mahoney across the 1910, 1920 and 1930 US Censuses in Essex, Massachusetts (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1909), then head of a 7-person household.
Age 21
b. ~1909
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Essex, Massachusetts |
| Surname | Mahoney |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | Cook |
| Industry | Restaurant |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Cook |
| Township / Ward | Methuen Town |
| Est. Birth Year | ~1909 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Joseph Mahoney | Son | — | 18 | ~1912 |
| John Mahoney | Son | — | 23 | ~1907 |
| Mary Mahoney | Spouse | — | 50 | ~1880 |
| John Mahoney | Head | — | 50 | ~1880 |
| Frank Smith | Other | — | 28 | ~1902 |
| Mary Mahoney | Daughter | — | 15 | ~1915 |
| James Mahoney | Son | — | 21 | ~1909 |
Census Appearances
1910
Essex, Massachusetts
Son, age 1
Essex, Massachusetts · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Essex, Massachusetts
Son, age 10
Essex, Massachusetts · implied b. ~1910 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Essex, Massachusetts
Son, age 21
Essex, Massachusetts · implied b. ~1909 — 7 household members
| Surname | Mahoney |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Cook |
| Industry | Restaurant |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Mahoney across 3 US Census years (1910, 1920 and 1930) in Essex, Massachusetts, using XGBoost record linkage. Identified parents: father John Mahoney (~0.92 confidence) and father John Mahoney (~0.92 confidence) and mother Mary Mahoney (~0.92 confidence) and mother Mary Mahoney (~0.92 confidence) and mother Mrs Mahoney (~0.92 confidence) and father John Mahoney (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Mahoney
b. ~1880
Source father
● Household
· direct · ~0.92
Father
John Mahoney
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Mary Mahoney
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Mary Mahoney
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Mrs Mahoney
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
John Mahoney
b. ~1885
Source father
● Household
· direct · ~0.92
This person
Anchor record
James Mahoney
Son · 1930 · age 21 · b. ~1909 · Massachusetts
★ You are viewing this record
Sibling
Joseph Mahoney
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mahoney
Sibling · 1930 · age 23
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 — Essex, Massachusetts
Open full size
1930 US Federal Census — Essex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel901:0631)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ruth Langan | 18 | Daughter | — | Massachusetts |
| 2 | Charles Langan | 60 | Head | Meter Repairman | Irish Free State |
| 3 | Catherine Langan | 50 | Wife | — | Irish Free State |
| 4 | Charles Langan | 28 | Son | Salesman | Massachusetts |
| 5 | Daniel Langan | 21 | Son | Clerk | Massachusetts |
| 6 | Leroy Langan | 14 | Son | — | Massachusetts |
| 7 | Maria Atkinson | 67 | Head | — | England |
| 8 | Edward Feeney | 63 | Head | Gardiner | Massachusetts |
| 9 | Mary Feeney | 52 | Wife | — | Massachusetts |
| 10 | William Taylor | 58 | Head | Laborer | Massachusetts |
| 11 | Alphonsine Taylor | 56 | Wife | — | Canada-French |
| 12 | George Taylor | 38 | Son | Drayer | Massachusetts |
| 13 | Sophia Taylor | 21 | Daughter | Bookkeeper | Massachusetts |
| 14 | William Taylor | 19 | Son | Cutter | Massachusetts |
| 15 | Curtis M. Jr Foss | 39 | Head | Custodian | Massachusetts |
| 16 | Mary W. Foss | 36 | Wife | — | Massachusetts |
| 17 | Charles W. Baston | 49 | Head | Second Hand | England |
| 18 | Annie Baston | 45 | Wife | — | Massachusetts |
| 19 | David Parker | 81 | Father-in-law | Retired | England |
| 20 | John Laing | 64 | Head | Loomfixer | Scotland |
| 21 | Abigail Laing | 62 | Wife | — | Scotland |
| 22 | Bernhard Otto | 70 | Head | Retired | Germany |
| 23 | Margaret Otto | 70 | Wife | — | Scotland |
| 24 | Robert Otto | 39 | Son | Janitor | Rhode Island |
| 25 | Eva M. Otto | 34 | Daughter-in-law | — | Massachusetts |
| 26 | Robert Jr. Otto | 3 | Grandson | — | Massachusetts |
| 27 | Agnes Otto | 0 | Granddaughter | — | Massachusetts |
| 28 | Robert Gaffney | 79 | Head | Retired | Irish Free State |
| 29 | Mary Gaffney | 75 | Wife | — | Irish Free State |
| 30 | William Gaffney | 34 | Son | Salesman | Massachusetts |
| 31 | Elizabeth Gaffney | 10 | Granddaughter | — | Massachusetts |
| 32 | John J. Mahoney | 50 | Head | Hoseman | Massachusetts |
| 33 | Mary Mahoney | 50 | Wife | — | Massachusetts |
| 34 | John A. Mahoney | 23 | Son | Life Guard | Massachusetts |
| 35 | James Mahoney THIS PERSON | 21 | Son | Cook | Massachusetts |
| 36 | Joseph Mahoney | 18 | Son | Farm Laborer | Massachusetts |
| 37 | Mary Mahoney | 15 | Daughter | — | Massachusetts |
| 38 | Frank Smith | 28 | Nephew | Steamfitter | Massachusetts |
| 39 | Alpina G. Mulhilly | 48 | Head | — | Irish Free State |
| 40 | Phillip Mulhilly | 18 | Son | Laborer | Massachusetts |
| 41 | Cornelius Mulhilly | 17 | Son | Dresser | Massachusetts |
| 42 | Mary Mulhilly | 27 | Step-daughter | Specker | Massachusetts |
| 43 | Theodule Houle | 48 | Head | Blacksmith | Canada-French |
| 44 | Josephine Houle | 49 | Wife | — | Vermont |
| 45 | Rene Houle | 26 | Son | Clerk | Massachusetts |
| 46 | Germain Houle | 23 | Daughter | Office Girl | Massachusetts |
| 47 | Hubert Houle | 21 | Son | Clerk | Massachusetts |
| 48 | Chanel Houle | 19 | Son | Dresser | Massachusetts |
| 49 | Arthur Houle | 18 | Son | Cutter | Massachusetts |
| 50 | Lionel Houle | 16 | Son | Laborer | Massachusetts |
Pedigree Summary
James + 3 siblings
Gen 1 · 6 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)