JD
John Douglas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Lake-County, Ohio
Our Model Tree links this John Douglas across the 1920, 1930 and 1940 US Censuses in Lake-County, Ohio (XGBoost, ~Confirmed), with identified parents Robert & Douglas — first a son (b.~1913), then head of a 3-person household.
Age 27
b. ~1913
Male
Son
Born: Scotland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Ohio |
| Surname | Douglas |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Willoughby |
| 1935 Residence (County) | Lake |
| Naturalization Status | Alien |
| Additional Details | |
| Occupation | Press operater |
| Industry | Rubber mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Press Operater |
| Township / Ward | Willoughby |
| Est. Birth Year | ~1913 |
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 |
|---|---|---|---|---|
| Mary Douglas | Daughter | — | 20 | ~1920 |
| John Douglas | Son | — | 27 | ~1913 |
| Douglas Douglas | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Lake, Ohio
Son, age 7
Lake, Ohio · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Douglas |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Scotland |
| Year of Immigration | 1914 |
| Naturalization Status | Alien |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1930
Lake, Ohio
Son, age 17
Lake, Ohio · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Douglas |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Scotland |
| Naturalization Status | First papers filed |
| Year of Immigration | 1914 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Lake-County, Ohio
Son, age 27
Lake-County, Ohio · implied b. ~1913 — 3 household members
| Surname | Douglas |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Willoughby |
| 1935 Residence (County) | Lake |
| Naturalization Status | Alien |
| Occupation | Press operater |
| Industry | Rubber mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 Douglas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Douglas (~0.92 confidence) and mother Douglas Douglas (~0.92 confidence) and mother Jane Douglas (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Douglas
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Douglas Douglas
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Jane Douglas
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Douglas
Son · 1940 · age 27 · b. ~1913 · Ohio
★ You are viewing this record
Sibling
Mary Douglas
Sibling · 1940 · age 20
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 — Lake-County, Ohio
Open full size
1940 US Federal Census — Lake-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03094-00032)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Douglas Jean C Douglas | 50 | Wife | — | Scotland |
| 2 | John Douglas THIS PERSON | 27 | Son | Press Operater | Scotland |
| 3 | Mary Douglas | 20 | Daughter | Stenographer | Ohio |
| 4 | Charles Mayer | 59 | Head | Meat Cutter | Germany |
| 5 | Julia Mayer | 57 | Wife | — | Pennsylvania |
| 6 | Joseph Geiss | 49 | Head | Tailor | Austria |
| 7 | Sophie Geiss | 37 | Wife | — | Austria |
| 8 | Joseph Balaza | 29 | Head | Carman | Ohio |
| 9 | Balaza | 25 | Wife | Soda Clerk | Ohio |
| 10 | Michael Tafelice | 45 | Head | Janitor | Italy |
| 11 | Laura C Tafelice | 44 | Wife | — | Italy |
| 12 | Carman Tafelice | 19 | Son | Packer | Italy |
| 13 | Dovelia Tafelice | 15 | Daughter | — | Ohio |
| 14 | Amelia Tafelice | 13 | Daughter | — | Ohio |
| 15 | Patrick Iannadrea | 53 | Head | Carpenter | Italy |
| 16 | Laura Iannadrea | 48 | Wife | — | Italy |
| 17 | Michael Iannadrea | 21 | Son | Bobbin Man | Italy |
| 18 | Dominic Iannadrea | 19 | Son | Bobbin Man | Ohio |
| 19 | Angela Iannadrea | 17 | Daughter | — | Ohio |
| 20 | Columbia Iannadrea | 13 | Daughter | — | Ohio |
| 21 | John A. Fatica | 55 | Head | Carpenter | Italy |
| 22 | Laura Fatica | 46 | Wife | — | Italy |
| 23 | Catherine Fatica | 25 | Daughter | Trimmer | Ohio |
| 24 | Warren Fatica | 22 | Son | Golf Pro | Ohio |
| 25 | Jeffery Fatica | 19 | Son | Helper | Ohio |
| 26 | Delphina Fatica | 17 | Daughter | — | Ohio |
| 27 | Anthony Fatica | 15 | Son | — | Ohio |
| 28 | Hagy Coleman | 30 | Head | Office Clerk | Penna. |
| 29 | Margaret Coleman | 34 | Wife | — | Ohio |
| 30 | Janet Coleman | 5 | Daughter | — | Ohio |
| 31 | John Germin | 47 | Head | Laborer | Italy |
| 32 | Nathalia Germin | 52 | Wife | — | Italy |
| 33 | Michael Germin | 19 | Son | Electrician | Ohio |
| 34 | Peter Germin | 18 | Son | Inspector | Ohio |
| 35 | Mary Germin | 15 | Daughter | — | Ohio |
| 36 | Edward Germyn | 50 | Head | — | Ohio |
| 37 | Lavinia Germyn | 51 | Wife | Practical Nurse | Ohio |
| 38 | Ruth Germyn | 12 | Daughter | — | Ohio |
| 39 | Elizabeth Ryan | 76 | Lodger | — | Ohio |
| 40 | William Boyle | 37 | Head | Press Operater | Scotland |
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)