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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 1910, 1920, 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Annie & James — first a son (b.~1904), then head of a 3-person household.
Age 36
b. ~1904
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Mahoney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Occupation | Machinist |
| Industry | Woolen Mill |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 100 |
| Highest Grade | H 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Machinist |
| Township / Ward | Lawrence City |
| Est. Birth Year | ~1904 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Ruth Mahoney | Daughter | — | 34 | ~1906 |
| Mary Mahoney | Head | — | 27 | ~1913 |
| John Mahoney | Son | — | 36 | ~1904 |
Census Appearances
1910
Essex, Massachusetts
Son, age 6
Essex, Massachusetts · implied b. ~1904 — 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 | 6 |
| 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 16
Essex, Massachusetts · implied b. ~1904 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | dresser |
| Industry | woolen mill |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Essex, Massachusetts
Son, age 26
Essex, Massachusetts · implied b. ~1904 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Machinist |
| Industry | Machine Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Son, age 36
Essex-County, Massachusetts · implied b. ~1904 — 3 household members
| Surname | Mahoney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Occupation | Machinist |
| Industry | Woolen Mill |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 100 |
| Highest Grade | H 8 |
| 1935 Residence | Same place |
| 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 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Annie Mahoney (~0.92 confidence) and father James Mahoney (~0.92 confidence) and father Maurice Mahoney (~0.92 confidence) and mother Mary Mahoney (~0.92 confidence) and mother Mary Mahoney (~0.92 confidence) and mother Mary Mahoney (~0.50 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.85
Mother
Annie Mahoney
b. ~1880
Source mother
● Household
· direct · ~0.92
Father
James Mahoney
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Maurice Mahoney
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Mary Mahoney
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Mary Mahoney
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Mary Mahoney
b. ~1913
Source mother
● Household
· direct · ~0.5
This person
Anchor record
John Mahoney
Son · 1940 · age 36 · b. ~1904 · Massachusetts
★ You are viewing this record
Sibling
Ruth Mahoney
Sibling · 1940 · age 34
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-t0627-01584-00291)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clifford Bunt | 52 | Head | Machinist | Canada |
| 42 | Eveline Bunt | 15 | Daughter | — | Massachusetts |
| 43 | Louis Kindness | 45 | Head | Weaver | Lithuania |
| 44 | Julia Kindness | 50 | Wife | — | Lithuania |
| 45 | Vincent Sturgis | 25 | Son | Agent | Massachusetts |
| 46 | Salva Dubrickas | 47 | Boarder | Painter | Lithuania |
| 47 | Thomas Hudson | 48 | Head | Weaver | England |
| 48 | Alice Hudson | 45 | Wife | — | England |
| 49 | Thomas R Hudson | 18 | Son | Weaver | Massachusetts |
| 50 | Norman H Hudson | 10 | Son | — | Massachusetts |
| 51 | Anthony Aleksonis | 46 | Head | Weaver | Lithuania |
| 52 | Eva Aleksonis | 37 | Wife | — | Massachusetts |
| 53 | Arnold Aleksonis | 6 | Son | — | Massachusetts |
| 54 | Anthony Zelonis | 47 | Brother | Laborer | Lithuania |
| 55 | Elizabeth Zelonis | 42 | Sister | — | Lithuania |
| 56 | Peter Aleksonis | 48 | Brother | Variety | Lithuania |
| 57 | Mary E Mahoney | 27 | Head | — | Massachusetts |
| 58 | John Mahoney THIS PERSON | 36 | Son | Machinist | Massachusetts |
| 59 | Ruth Mahoney | 34 | Daughter | — | Massachusetts |
| 60 | Herbert Fielding | 44 | Head | Shipper | Massachusetts |
| 61 | Olive Fielding | 42 | Wife | Spooling | Massachusetts |
| 62 | Bernard Fielding | 19 | Son | — | Massachusetts |
| 63 | John Burke | 50 | Head | Mixer | Massachusetts |
| 64 | Hanna Burke | 45 | Wife | — | Ireland |
| 65 | John Mager | 35 | Head | Bartender | Ireland |
| 66 | Harriett Mager | 31 | Wife | — | Massachusetts |
| 67 | Henry Andruska | 51 | Head | Engineer | Massachusetts |
| 68 | Bertha Andruska | 50 | Wife | — | Massachusetts |
| 69 | Edward Andruska | 26 | Son | Manager | Massachusetts |
| 70 | George Nolan | 52 | Head | Watchman | England |
| 71 | Ethel Nolan | 52 | Wife | — | England |
| 72 | John Mackey | 53 | Head | Machinist | Lithuania |
| 73 | Alice Mackey | 51 | Wife | Weaver | Massachusetts |
| 74 | George Mackey | 24 | Son | — | Massachusetts |
| 75 | Agnes Mackey | 23 | Daughter | Office | Lithuania |
| 76 | Frank Hankinson | 46 | Head | — | Massachusetts |
| 77 | Ethel Hankinson | 44 | Wife | Second Hand | Massachusetts |
| 78 | Mary Hankinson | 13 | Daughter | — | Massachusetts |
| 79 | Sara White | 73 | Mother-in-law | — | England |
| 80 | Richard Turner | 43 | Head | Finisher | Maine |
Pedigree Summary
John + 1 sibling
Gen 1 · 6 parents
~0.85
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)