JM
James Mahoney — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cuyahoga-County, Ohio
Our Model Tree links this James Mahoney across the 1920, 1930 and 1940 US Censuses in Cuyahoga-County, Ohio (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1915), then head of a 8-person household.
Age 25
b. ~1915
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cuyahoga-County, Ohio |
| Surname | Mahoney |
| Given Name | James G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cleveland |
| 1935 Residence (County) | Cuyahoga |
| Additional Details | |
| Occupation | Baker |
| Industry | Bakery |
| Class of Worker | PW |
| Hours Worked | 39 |
| Income (1939) | 1300 |
| Highest Grade | H-4 |
| 1935 Residence | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Baker |
| Township / Ward | City Of Euclid |
| Est. Birth Year | ~1915 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| William Mahoney | Head | — | 55 | ~1885 |
| Gertrude Mahoney | Spouse | — | 56 | ~1884 |
| Margaret Mahoney | Daughter | — | 30 | ~1910 |
| Bernadine Mahoney | Daughter | — | 15 | ~1925 |
| John Mahoney | Son | — | 26 | ~1914 |
| Donald Mahoney | Son | — | 12 | ~1928 |
| Aldene Mahoney | Daughter | — | 16 | ~1924 |
| James Mahoney | Son | — | 25 | ~1915 |
Census Appearances
1920
Cuyahoga, Ohio
Son, age 4
Cuyahoga, Ohio · implied b. ~1916 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahony |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Cuyahoga, Ohio
Son, age 15
Cuyahoga, Ohio · implied b. ~1915 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Cuyahoga-County, Ohio
Son, age 25
Cuyahoga-County, Ohio · implied b. ~1915 — 8 household members
| Surname | Mahoney |
| Given Name | James G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cleveland |
| 1935 Residence (County) | Cuyahoga |
| Occupation | Baker |
| Industry | Bakery |
| Class of Worker | PW |
| Hours Worked | 39 |
| Income (1939) | 1300 |
| Highest Grade | H-4 |
| 1935 Residence | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Mahoney (~0.92 confidence) and father William Mahony (~0.92 confidence) and mother Gertrude Mahoney (~0.92 confidence) and father William Mahoney (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Mahoney
b. ~1860
Source father
● Household
· direct · ~0.92
Father
William Mahony
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Gertrude Mahoney
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
William Mahoney
b. ~1885
Source father
● Household
· direct · ~0.92
This person
Anchor record
James Mahoney
Son · 1940 · age 25 · b. ~1915 · Ohio
★ You are viewing this record
Sibling
Aldene Mahoney
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mahoney
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernadine Mahoney
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mahoney
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Mahoney
Sibling · 1940 · age 12
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 — Cuyahoga-County, Ohio
Open full size
1940 US Federal Census — Cuyahoga-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03052-00258)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ruth W. Gordon | 66 | Mother-in-law | — | Ohio |
| 42 | George J. Flack | 43 | Head | Salesman | Ohio |
| 43 | Elizabeth J. Flack | 30 | Wife | — | Ohio |
| 44 | Moses N. Ely | 77 | Head | — | Ohio |
| 45 | Mary E. Ely | 78 | Wife | — | Ohio |
| 46 | John G. Bluem | 53 | Head | Proprietor | Switzerland |
| 47 | Philmone Bluem | 51 | Wife | — | Switzerland |
| 48 | Annette L. Bluem | 22 | Daughter | — | Ohio |
| 49 | Hans J. (Ab) Bluem | 20 | Son | — | Ohio |
| 50 | Albert W. Bluem | 15 | Son | — | Ohio |
| 51 | William P. Mahoney | 55 | Head | Foreman | Pennsylvania |
| 52 | Gertrude F. Mahoney | 56 | Wife | — | Ohio |
| 53 | Margaret M. Mahoney | 30 | Daughter | — | Ohio |
| 54 | John P. Mahoney | 26 | Son | Baker | Ohio |
| 55 | James G. Mahoney THIS PERSON | 25 | Son | Baker | Ohio |
| 56 | Aldene L. Mahoney | 16 | Daughter | — | Ohio |
| 57 | Bernadine M. Mahoney | 15 | Daughter | — | Ohio |
| 58 | Donald T. Mahoney | 12 | Son | — | Ohio |
| 59 | Rose W. Kollin | 67 | Head | — | Ohio |
| 60 | Julia Northcott | 49 | Housekeeper | Housekeeper | New York |
| 61 | Ruel L. Shumway | 33 | Head | Electric Meter | Michigan |
| 62 | Lavona V. Shumway | 32 | Wife | — | New York |
| 63 | Jean E. Shumway | 13 | Daughter | — | Ohio |
| 64 | Ann D. Shumway | 11 | Daughter | — | Ohio |
| 65 | Benjamin F. Merkel | 69 | Head | — | Ohio |
| 66 | Flora F. Merkel | 68 | Wife | — | Ohio |
| 67 | Wilbur W. Merkel | 26 | Son | Attorney | Ohio |
| 68 | Phyllis Lenardo | 25 | Maid | Maid | Ohio |
| 69 | Carl Noeltner | 54 | Head | Proprietor | Ohio |
| 70 | Florence S. Noeltner | 56 | Sister | — | Ohio |
| 71 | Anthony Q. Difranco | 41 | Head | Painter | Ohio |
| 72 | Julia C. Difranco | 45 | Wife | — | Ohio |
| 73 | Florence F. Ferty | 43 | Sister-in-law | Office Machine Operator | Ohio |
| 74 | Frank Krupitzer | 56 | Head | Machinist | Ohio |
| 75 | Elsie B. Krupitzer | 54 | Wife | — | Ohio |
| 76 | Marian E. Krupitzer | 19 | Daughter | Bookkeeper | Ohio |
| 77 | Peter P. Frank | 77 | Head | — | Ohio |
| 78 | Mary A. Helms | 68 | Housekeeper | Housekeeper | Indiana |
| 79 | Joseph A. Madder | 27 | Head | Chemist | Ohio |
| 80 | Geneva H. Madder | 27 | Wife | — | Pennsylvania |
Related Census Records
Pedigree Summary
James + 5 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 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)