JD
John Dunlap — 1940 US Census Record
Model Tree available1940 United States Federal Census · Multnomah-County, Oregon
Our Model Tree links this John Dunlap across the 1920, 1930 and 1940 US Censuses in Multnomah-County, Oregon (XGBoost, ~Confirmed), with identified parents William & Mary — first a son (b.~1900), then head of a 3-person household.
Age 40
b. ~1900
Male
Son
Born: Oregon
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Multnomah-County, Oregon |
| Surname | Dunlap |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Portland city |
| 1935 Residence (County) | Multnomah |
| Additional Details | |
| Occupation | Automobile mechanic |
| Industry | Baggage & Taxi |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 332 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same house |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
| Occupation | Automobile Mechanic |
| Township / Ward | Portland City |
| Est. Birth Year | ~1900 |
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 |
|---|---|---|---|---|
| John Dunlap | Son | — | 40 | ~1900 |
| Mary Dunlap | Head | — | 67 | ~1873 |
| Olive Dunlap | Daughter | — | 42 | ~1898 |
Census Appearances
1920
Multnomah, Oregon
Son, age 19
Multnomah, Oregon · implied b. ~1901 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dunlap |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | New York |
| Mother's Birthplace | Wisconsin |
| Occupation | Helper |
| Industry | Railway Shops |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1930
Multnomah, Oregon
Son, age 29
Multnomah, Oregon · implied b. ~1901 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dunlap |
| Given Name | John H |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | New York |
| Mother's Birthplace | Wisconsin |
| Occupation | mechanic |
| Industry | garage |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1940
Multnomah-County, Oregon
Son, age 40
Multnomah-County, Oregon · implied b. ~1900 — 3 household members
| Surname | Dunlap |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Portland city |
| 1935 Residence (County) | Multnomah |
| Occupation | Automobile mechanic |
| Industry | Baggage & Taxi |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 332 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same house |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
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 Dunlap across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Dunlap (~0.92 confidence) and mother Mary Dunlap (~0.92 confidence) and mother Mary Dunlap (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Dunlap
b. ~1860
Source father
● Household
· direct · ~0.92
Mother
Mary Dunlap
b. ~1873
Source mother
● Household
· direct · ~0.92
Mother
Mary Dunlap
b. ~1874
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Dunlap
Son · 1940 · age 40 · b. ~1900 · Oregon
★ You are viewing this record
Sibling
Olive Dunlap
Sibling · 1940 · age 42
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 — Multnomah-County, Oregon
Open full size
1940 US Federal Census — Multnomah-County, Oregon
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03392-00925)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ray Keerins | 36 | Head | Salesman | Oregon |
| 42 | Sylvia J. Keerins | 30 | Wife | — | Oregon |
| 43 | Shirley L. Keerins | 5 | Daughter | — | California |
| 44 | Mary L. Keerins | 34 | Sister | Clerk | Oregon |
| 45 | Bick A. Matzen | 24 | Lodger | Laborer | Montana |
| 46 | Morris Sherff | 59 | Head | Proprietor | Russia |
| 47 | Celia B. Sherff | 48 | Wife | — | New York |
| 48 | Alfred Sherff | 24 | Son | Appliance Salesman | Oregon |
| 49 | David B. Sherff | 21 | Son | Appliance Salesman | Oregon |
| 50 | Samuel Friend | 60 | Head | Proprietor | New York |
| 51 | Emma Friend | 60 | Wife | Bookkeeper | Czechoslovakia |
| 52 | Mary D. Dunlap | 67 | Head | — | Wisconsin |
| 53 | Olive Dunlap | 42 | Daughter | Telephone Operator | North Dakota |
| 54 | John H. Dunlap THIS PERSON | 40 | Son | Automobile Mechanic | Oregon |
| 55 | Elton H. Coper | 39 | Head | Stationary Engineer | California |
| 56 | Emily C. Coper | 37 | Wife | — | Oklahoma |
| 57 | Marian L. Coper | 13 | Daughter | — | Oregon |
| 58 | Glenn E. Coper | 11 | Son | — | Oregon |
| 59 | Ray H. Coper | 5 | Son | — | Oregon |
| 60 | Allie S. Etchison | 65 | Head | — | Nebraska |
| 61 | Ora G. Steele | 46 | Head | Presser | Kansas |
| 62 | Ora C. Steele | 45 | Wife | — | Oklahoma |
| 63 | Martha A. Creel | 82 | Mother-in-law | — | Texas |
| 64 | — | None | — | — | — |
| 65 | Lawrence Lickman | 31 | Head | Publicity Manager | Oregon |
| 66 | Genevieve P. Lickman | 25 | Wife | — | Oregon |
| 67 | John W. Baty | 48 | Head | Assistant Superintendent | Oregon |
| 68 | Mamie Baty | 48 | Wife | — | Kansas |
| 69 | Jean C. Baty | 20 | Daughter | Clerk | Oregon |
| 70 | Christian Winkler | 62 | Head | Machinist | Germany |
| 71 | Anna Winkler | 69 | Wife | — | Germany |
| 72 | Ray Peterson | 37 | Head | Timekeeper | Oregon |
| 73 | John Peterson | 26 | Wife | Teacher | Oregon |
| 74 | Charles H. Huinmentt | 44 | Head | Fire Fighter | Colorado |
| 75 | Mary K. Huinmentt | 40 | Wife | — | Russia |
| 76 | Willie E. Spivey | 17 | Step-son | — | Oregon |
| 77 | Harry B. Huffman | 31 | Head | Stationary Engineer | Oregon |
| 78 | Irene L. Huffman | 33 | Wife | — | Oregon |
| 79 | Kenneth B. Huffman | 7 | Son | — | Oregon |
| 80 | Floyd M. Boyce | 29 | Head | Proprietor | Oregon |
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)