JW
James Warner — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Ohio
Our Model Tree links this James Warner across the 1930 and 1940 US Censuses in Montgomery-County, Ohio (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 12-person household.
Age 20
b. ~1920
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Ohio |
| Surname | Warner |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Dayton City |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Plumber Apprentice |
| Industry | Lager & Plummer |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1060 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Plumber Apprentice |
| Township / Ward | Dayton City |
| Est. Birth Year | ~1920 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Warner | Son | — | 20 | ~1920 |
| James Warner | Son | — | 2 | ~1938 |
| Virginia Warner | Daughter | — | 14 | ~1926 |
| Nellie Warner | Spouse | — | 48 | ~1892 |
| Pauline Warner | Daughter | — | 16 | ~1924 |
| David Warner | Head | — | 45 | ~1895 |
| Earl Warner | Son | — | 9 | ~1931 |
| Betty Warner | Daughter | — | 5 | ~1935 |
| Jeanette Warner | Daughter | — | 23 | ~1917 |
| Donald Warner | Son | — | 11 | ~1929 |
| Franklin Warner | Son | — | 7 | ~1933 |
| Robert Warner | Son | — | 18 | ~1922 |
Census Appearances
1930
Montgomery, Ohio
Son, age 9
Montgomery, Ohio · implied b. ~1921 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Werner |
| Given Name | James H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Montgomery-County, Ohio
Son, age 20
Montgomery-County, Ohio · implied b. ~1920 — 12 household members
| Surname | Warner |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Dayton City |
| 1935 Residence (County) | Montgomery |
| Occupation | Plumber Apprentice |
| Industry | Lager & Plummer |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1060 |
| Highest Grade | Hs 4 |
| 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 Warner across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Warner
Son · 1940 · age 20 · b. ~1920 · Ohio
★ You are viewing this record
Sibling
Robert Warner
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Pauline Warner
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Warner
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Warner
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Earl Warner
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Warner
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Warner
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jeanette Warner
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Franklin Warner
Sibling · 1940 · age 7
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 — Montgomery-County, Ohio
Open full size
1940 US Federal Census — Montgomery-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03251-00393)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Linda Grinko | 39 | Wife | Housewife | Ohio |
| 2 | John Grinko | 33 | Head | Assembler | Missouri |
| 3 | Helen Grinko | 25 | Wife | Seamstress | Ohio |
| 4 | John Grinko | 1 | Son | — | Ohio |
| 5 | Janice Grinko | 1 | Daughter | — | Ohio |
| 6 | Paul Grinko | 76 | Father | — | Yugoslavia |
| 7 | Louise Sopcic | 65 | Mother | — | Yugoslavia |
| 8 | David Schaperio | 36 | Head | Manager | Ohio |
| 9 | Leah Schaperio | 32 | Wife | Secretary | Penn. |
| 10 | Sanford Schaperio | 11 | Son | — | Ohio |
| 11 | Marlene Schaperio | 8 | Daughter | — | Ohio |
| 12 | John Costaco | 53 | Head | Moulder (Finisher) | Irish Free State |
| 13 | Delia Costaco | 50 | Wife | — | Irish Free State |
| 14 | Walter Costaco | 33 | Son | Welfare Director | Ohio |
| 15 | James Costaco | 25 | Son | Shipping Clerk | Ohio |
| 16 | Dorothy Costaco | 21 | Daughter | Office Work | Ohio |
| 17 | David A. Warner | 45 | Head | Apprentice | Ohio |
| 18 | Nellie Warner | 48 | Wife | — | Ohio |
| 19 | Jeanette Warner | 23 | Daughter | Bookkeeper | Ohio |
| 20 | James Warner THIS PERSON | 20 | Son | Plumber Apprentice | Ohio |
| 21 | Robert Warner | 18 | Son | Garage Helper | Ohio |
| 22 | Pauline Warner | 16 | Daughter | — | Ohio |
| 23 | Virginia Warner | 14 | Daughter | — | Ohio |
| 24 | Donald Warner | 11 | Son | — | Ohio |
| 25 | Earl Warner | 9 | Son | — | Ohio |
| 26 | Franklin Warner | 7 | Son | — | Ohio |
| 27 | Betty Warner | 5 | Daughter | — | Ohio |
| 28 | James Warner | 2 | Son | — | Ohio |
| 29 | Mike Olah | 48 | Head | Micro Oper. | Hungary |
| 30 | Elizabeth Olah | 16 | Daughter | Grocery | Ohio |
| 31 | Helen Olah | 14 | Daughter | — | Ohio |
| 32 | Eileen Olah | 13 | Daughter | — | Ohio |
| 33 | Mike Olah | 9 | Son | — | Ohio |
| 34 | Casimir Szyminski | 26 | Head | Press Oper. | Ohio |
| 35 | Mary Szyminski | 24 | Wife | — | Ohio |
| 36 | Barbara Szyminski | 2 | Daughter | — | Ohio |
| 37 | Frances Szyminski | 0 | Daughter | — | Ohio |
| 38 | Howard Brown | 33 | Head | Punch Press Oper. | Ind. |
| 39 | Edgar Waldron | 67 | Head | Boiler Inspector | Kentucky |
| 40 | William Hess | None | Head | Boiler Maker | Ohio |
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)