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John Mahoney — 1940 US Census Record
Model Tree available1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this John Mahoney across the 1920, 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents John & Margaret — first a son (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Mahoney |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Industry | 0 |
| Highest Grade | C-2 |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lynn City |
| Est. Birth Year | ~1918 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Eleanor Mahoney | Daughter | — | 31 | ~1909 |
| Mary Mahoney | Head | — | 62 | ~1878 |
| Bessie Murray | Other | — | 55 | ~1885 |
| John Mahoney | Son | — | 22 | ~1918 |
Census Appearances
1920
Essex, Massachusetts
Son, age 2
Essex, Massachusetts · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Essex, Massachusetts
Son, age 12
Essex, Massachusetts · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Son, age 22
Essex-County, Massachusetts · implied b. ~1918 — 4 household members
| Surname | Mahoney |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (County) | Essex |
| Industry | 0 |
| Highest Grade | C-2 |
| 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 John Mahoney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Mahoney (~0.92 confidence) and mother Margaret Mahoney (~0.92 confidence) and mother Mary Mahoney (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Mahoney
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Margaret Mahoney
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Mary Mahoney
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mahoney
Son · 1940 · age 22 · b. ~1918 · Massachusetts
★ You are viewing this record
Sibling
Eleanor Mahoney
Sibling · 1940 · age 31
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
1940 US Federal Census — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01696-00713)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Glen Barnard | 1 | Son | — | Massachusetts |
| 2 | Ray B. Murchie | 26 | Head | Motor Tester | Massachusetts |
| 3 | Mary Murchie | 29 | Wife | — | Massachusetts |
| 4 | Judith Murchie | 3 | Daughter | — | Massachusetts |
| 5 | Almeda O. Casey | 42 | Head | Shoe Factory | Canada-English |
| 6 | Dorothy Casey | 21 | Daughter | — | Massachusetts |
| 7 | John E. Mcmenimen | 71 | Head | — | Massachusetts |
| 8 | Mary E. Mcmenimen | 44 | Daughter | Bookkeeper | Massachusetts |
| 9 | Mary A. Mahoney | 62 | Head | — | Massachusetts |
| 10 | Eleanor M. Mahoney | 31 | Daughter | Bookkeeper | Massachusetts |
| 11 | John F. Mahoney THIS PERSON | 22 | Son | — | Massachusetts |
| 12 | Bessie Murray | 55 | Mother | Operator | Massachusetts |
| 13 | William Dunsable | 26 | Head | Draughtsman | Massachusetts |
| 14 | Phyllis Dunsable | 27 | Wife | 0 | England |
| 15 | Leslie Dunsable | 2 | Son | — | Massachusetts |
| 16 | Anna E. Landry | 65 | Head | Nurse | Massachusetts |
| 17 | Isabel Landry | 63 | Sister | — | Massachusetts |
| 18 | William E. Landry | 63 | Brother | — | Massachusetts |
| 19 | Catherine Eddy | 51 | Head | Office Manager | Massachusetts |
| 20 | Margaret Flynn | 54 | Sister | Office Clerk | Massachusetts |
| 21 | Mary E. D. Anderson | 61 | Cousin | — | Massachusetts |
| 22 | John H. Taylor | 58 | Cousin | W.P.A. Federal Arts | Canada-English |
| 23 | Catherine Taylor | 51 | Cousin | — | Massachusetts |
| 24 | Frances E. Mcmenimen | 62 | Cousin | — | Massachusetts |
| 25 | Frances Haywood | 23 | Lodger | Office Clerk | Massachusetts |
| 26 | Helen D. Murphy | 38 | Head | Clerical | Massachusetts |
| 27 | Catherine Murphy | 26 | Sister | — | Massachusetts |
| 28 | Genevieve Murphy | 41 | Sister | — | Massachusetts |
| 29 | Catherine Mcmanus | 24 | Lodger | — | Scotland |
| 30 | Leo F. B. Rain | 45 | Head | Machine Operator | New York |
| 31 | Lillian Rain | 48 | Wife | — | Massachusetts |
| 32 | Daniel F. Rain | 22 | Son | Machine Operator | Massachusetts |
| 33 | Arthur L. Rain | 18 | Son | New Worker | Massachusetts |
| 34 | Nellie O. Long | 23 | Head | — | Maine |
| 35 | Louis Sughrue | 66 | Head | Shoe Factory | Russia |
| 36 | Dora Sughrue | 58 | Wife | 0 | Russia |
| 37 | Samuel Sughrue | 26 | Son | Lawyer | Massachusetts |
| 38 | Morris Goldberg | 65 | Head | 0 | Russia |
| 39 | Gertrude Goldberg | 57 | Wife | 0 | Russia |
| 40 | Ida Goldberg | 31 | Daughter | Clerk | Massachusetts |
Pedigree Summary
John + 1 sibling
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)