JD
James Dempsey — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cuyahoga-County, Ohio
Our Model Tree links this James Dempsey across the 1920, 1930 and 1940 US Censuses in Cuyahoga-County, Ohio (XGBoost, ~Confirmed), with identified parents Adah & Mary — first a son (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cuyahoga-County, Ohio |
| Surname | Dempsey |
| Given Name | James H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Bratenahl Village |
| 1935 Residence (County) | Cuyahoga |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | C 5 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Bratenahl Village |
| Est. Birth Year | ~1917 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Harriet Kelley | Other | — | 40 | ~1900 |
| James Dempsey | Son | — | 23 | ~1917 |
| Louise Dempsey | Daughter | — | 19 | ~1921 |
| Isabel Dempsey | Daughter | — | 21 | ~1919 |
| Adah Dempsey | Head | — | 61 | ~1879 |
Census Appearances
1920
Cuyahoga, Ohio
Son, age 3
Cuyahoga, Ohio · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dempsey |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | none |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Cuyahoga, Ohio
Son, age 13
Cuyahoga, Ohio · implied b. ~1917 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dempsey |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Cuyahoga-County, Ohio
Son, age 23
Cuyahoga-County, Ohio · implied b. ~1917 — 5 household members
| Surname | Dempsey |
| Given Name | James H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Bratenahl Village |
| 1935 Residence (County) | Cuyahoga |
| Class of Worker | 0 |
| Highest Grade | C 5 |
| 1935 Residence | Same place |
| 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 Dempsey across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Adah Dempsey (~0.92 confidence) and mother Mary Dempsey (~0.92 confidence) and mother Minnie Dempsey (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Adah Dempsey
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
Mary Dempsey
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Minnie Dempsey
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Dempsey
Son · 1940 · age 23 · b. ~1917 · Ohio
★ You are viewing this record
Sibling
Louise Dempsey
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Isabel Dempsey
Sibling · 1940 · age 21
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-t0627-03048-00569)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary H. Henderson | 64 | Nursemaid | Nursemaid | Ohio |
| 2 | Hanna Berntson | 57 | Cook | Cook | Sweden |
| 3 | Helen Hallelet|Hallelt | 43 | Second | Second Maid | Ohio |
| 4 | Adah B. Dempsey | 61 | Head | — | England |
| 5 | James H. Dempsey THIS PERSON | 23 | Son | — | Ohio |
| 6 | Isabel H. Dempsey | 21 | Daughter | — | Ohio |
| 7 | Louise H. Dempsey | 19 | Daughter | — | Ohio |
| 8 | Harriet Kelley | 40 | Cook | Cook | Canada Eng. |
| 9 | James Hamilton | 60 | Head | Gardener | Scotland |
| 10 | Rasmina Hanson | 46 | Housekeeper | Housekeeper | England |
| 11 | Max Felger | 36 | Head | Chauffeur | Germany |
| 12 | Elsie Felger | 33 | Wife | Waitress | Germany |
| 13 | Maxine Felger | 11 | Daughter | — | Ohio |
| 14 | Matilda Thomas | 54 | Head | Laundress | Jugo Slavia |
| 15 | John Longar | 31 | Son | Elevator Operator | Ohio |
| 16 | William Thomas | 26 | Son | — | Colorado |
| 17 | Henry E. Sheffield | 56 | Head | Attorney | Ohio |
| 18 | Laura B. Sheffield | 88 | Mother | — | Ohio |
| 19 | Caroline Bures | 45 | Waitress | Waitress | Ohio |
| 20 | Selma Erickson | 67 | Cook | Cook | Sweden |
| 21 | Harry O. Moser | 64 | Head | Carpenter | Pennsylvania |
| 22 | Agusta J. Moser | 60 | Wife | — | Ohio |
| 23 | Merrill Muehlhauser | 35 | Son-in-law | Piano Salesman | Ohio |
| 24 | Margery M. Muehlhauser | 34 | Daughter | Piano Teacher | Ohio |
| 25 | Nadja Muehlhauser | 8 | Daughter | — | Ohio |
| 26 | Derek Muehlhauser | 5 | Son | — | Ohio |
| 27 | Albert E. Satter | 48 | Head | Real Estate | Washington |
| 28 | Verona Satter | 39 | Wife | — | Ohio |
| 29 | Patricia J. Satter | 19 | Daughter | Sales Clerk | Ohio |
| 30 | Caroline E. Satter | 14 | Daughter | — | Ohio |
| 31 | Mary Louise Satter | 12 | Daughter | — | Ohio |
| 32 | Nelda Greeley | 42 | Sister-in-law | Sales Clerk | Ohio |
| 33 | Alexander Saddeo | 40 | Head | Secy. & Treas. | Pennsylvania |
| 34 | Lucy X. Saddeo | 40 | Wife | School Teacher | Ohio |
| 35 | Clifford Saddeo | 15 | Son | — | Ohio |
| 36 | Frank Saddeo | 69 | Father | — | Italy |
| 37 | Emily Saddeo | 70 | Mother | — | Italy |
| 38 | Lucian J. De More | 41 | Head | Export Mgr. | Ohio |
| 39 | Angela R. De More | 39 | Wife | — | New York |
| 40 | George Nkapitzky | 34 | Head | Traveling Auditor | Ohio |
Pedigree Summary
James + 2 siblings
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)