JD
James Duncan — 1930 US Census Record
Model Tree available1930 United States Federal Census · King, Washington
Our Model Tree links this James Duncan across the 1920, 1930 and 1940 US Censuses in King, Washington (XGBoost, ~Confirmed), with identified parents George & Nellie — first a head (b.~1900), then head of a 3-person household.
Age 30
b. ~1900
Male
Head
Born: Nebraska
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | King, Washington |
| Surname | Duncan |
| Given Name | James B W |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Nebraska |
| Age at First Marriage | 22 |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Occupation | Traffic Manager |
| Industry | Bag Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 6000 |
| Radio Set | R |
| Veteran | Yes |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
| Occupation | Traffic Manager |
| Township / Ward | City Of Seattle |
| 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 1930 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Barbara Duncan | Daughter | — | 5 | ~1925 |
| James Duncan | Head | — | 30 | ~1900 |
| Hazel Duncan | Spouse | — | 30 | ~1900 |
Census Appearances
1920
King, Washington
Son, age 20
King, Washington · implied b. ~1900 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | James B. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Nebraska |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Illinois |
| Occupation | Salesman |
| Industry | Retail Grocery |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1930
King, Washington
Head, age 30
King, Washington · implied b. ~1900 — 3 household members
| Surname | Duncan |
| Given Name | James B W |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Nebraska |
| Age at First Marriage | 22 |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Illinois |
| Occupation | Traffic Manager |
| Industry | Bag Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 6000 |
| Radio Set | R |
| Veteran | Yes |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1940
King-County, Washington
Other, age 40
King-County, Washington · implied b. ~1900 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | DUNCAN |
| Given Name | James |
| Relationship to Head | Roomer |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | Nebraska |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Occupation | TRUCK DRIVER |
| Industry | Bag manuf. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 3780 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
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 Duncan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Duncan (~0.92 confidence) and mother Nellie Duncan (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Duncan
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Nellie Duncan
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Duncan
Head · 1930 · age 30 · b. ~1900 · Washington
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — King, Washington
Open full size
1930 US Federal Census — King, Washington
Page Contents
15 people indexed on this census page (ia:1930:15thcensus2502unit:0793)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James B W Duncan THIS PERSON | 30 | Head | Traffic Manager | Nebraska |
| 2 | Hazel B Duncan | 30 | Wife | — | Colorado |
| 3 | Barbara J Duncan | 5 | Daughter | — | Washington |
| 4 | Sam Unverlein | 61 | Head | Salesman | Denmark |
| 5 | Freda Unverlein | 45 | Wife | — | Norway |
| 6 | Herbert W Blackstock | 32 | Head | President | North Carolina |
| 7 | Alice I Blackstock | 32 | Wife | — | California |
| 8 | Robert V Blackstock | 6 | Son | — | Washington |
| 9 | Bruce H Blackstock | 1 | Son | — | Washington |
| 10 | John E Denney | 30 | Head | President | Washington |
| 11 | Catherine B Denney | 24 | Wife | — | British Columbia |
| 12 | Donald B Denney | 2 | Son | — | Washington |
| 13 | Willard L Shafer | 35 | Head | Salesman | Illinois |
| 14 | Esther V Shafer | 34 | Wife | Clerk | Minnesota |
| 15 | Doris S Gumsden | 17 | Sister | — | No Dakota |
Pedigree Summary
James
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)