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William Duncan — 1940 US Census Record

Model Tree available

1940 United States Federal Census · Ringgold-County, Iowa

Our Model Tree links this William Duncan across the 1920, 1930 and 1940 US Censuses in Ringgold-County, Iowa (XGBoost, ~Confirmed), with identified parents A & Albin — first a son (b.~1909), then head of a 2-person household.

Age 31 b. ~1909 Male Son Born: Iowa Single

1940 Census Record Details

Census Year1940
LocationRinggold-County, Iowa
SurnameDuncan
Given NameWilliam
Relationship to HeadSon
SexM
Color / RaceWhite
Age31
Marital StatusSingle
BirthplaceIowa
1935 Residence (City)Shannon City town
1935 Residence (County)Ringgold County
Additional Details
IndustryTrucker
Class of WorkerLivestock Hauling Grain
Highest GradeHs 4
1935 ResidenceSame place
Birth StateIowa
Birth CountryUnited States
Birthplace (normalized)iowa
Township / WardShannon City Town
Est. Birth Year~1909

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.

2 people recorded at the same address in the 1940 census.

Name Relation to head Relative to William Age Birth yr
Florence Duncan Head — 65 ~1875
William Duncan Son — 31 ~1909

Census Appearances

1920
Ringgold, Iowa
Son, age 10
Ringgold, Iowa · implied b. ~1910 — 4 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Duncan
Given Name William G
Relationship to Head Son
Sex M
Color / Race White
Age 10
Marital Status Single
Birthplace Iowa
Father's Birthplace Iowa
Mother's Birthplace Iowa
Can Read Yes
Can Write Yes
Speaks English Yes
Birth State Iowa
Birth Country United States
Birthplace (normalized) iowa
1930
Ringgold, Iowa
Son, age 21
Ringgold, Iowa · implied b. ~1909 — 3 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Duncan
Given Name William H.
Relationship to Head Son
Sex M
Color / Race White
Age 21
Marital Status Single
Birthplace Iowa
Father's Birthplace Iowa
Mother's Birthplace Iowa
Occupation Salesman
Industry Retail Impl. Impls.
Class of Worker W
Can Read/Write Yes
Veteran No
Birth State Iowa
Birth Country United States
Birthplace (normalized) iowa
1940
Ringgold-County, Iowa
Son, age 31
Ringgold-County, Iowa · implied b. ~1909 — 2 household members
Surname Duncan
Given Name William
Relationship to Head Son
Sex M
Color / Race White
Age 31
Marital Status Single
Birthplace Iowa
1935 Residence (City) Shannon City town
1935 Residence (County) Ringgold County
Industry Trucker
Class of Worker Livestock Hauling Grain
Highest Grade Hs 4
1935 Residence Same place
Birth State Iowa
Birth Country United States
Birthplace (normalized) iowa

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.
Model Tree available
Our Model Tree links William Duncan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father A Duncan (~0.92 confidence) and father Albin Duncan (~0.92 confidence) and mother Florence Duncan (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1 Parents confidence ≈ 0.92
Father
A Duncan
b. ~1872
Source father
● Household · direct · ~0.92
Father
Albin Duncan
b. ~1872
Source father
● Household · direct · ~0.92
Mother
Florence Duncan
b. ~1875
Source mother
● Household · direct · ~0.92
This person
Anchor record
William Duncan
Son · 1940 · age 31 · b. ~1909 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+) Probable / derived (~0.65–0.89) Candidate (<0.65, unverified)

Original Census Page

1940 US Federal Census — Ringgold-County, Iowa Open full size

Page Contents

32 people indexed on this census page (nara:1940:m-t0627-01201-00108)

Line Name Age Relation Occupation Birthplace
1 Bert Shields 54 Head Laborer Iowa
2 Elizabeth Shields 54 Wife — Iowa
3 Russell Shields 10 Son — Iowa
4 Norma Shields 8 Daughter — Iowa
5 Eldon Shields 7 Daughter — Iowa
6 Albert Shields 4 Son — Iowa
7 Otto Bird 29 Head Laborer Iowa
8 Opal Bird 22 Wife — Iowa
9 Junior Bird 6 Son — Iowa
10 Betty Lou Bird 4 Daughter — Iowa
11 Jerry Bird 1 Son — Iowa
12 Anna Brown 70 Head — Iowa
13 Francis Crowell 39 Head Mechanic Iowa
14 Nina Crowell 36 Wife — Iowa
15 Joy Crowell 14 Daughter — Iowa
16 John Crowell 13 Son — Iowa
17 Gene Crowell 12 Son — Iowa
18 Ramona Crowell 10 Daughter — Iowa
19 Dorthy Crowell 8 Daughter — Iowa
20 Donella Crowell 6 Daughter — Iowa
21 Donald Crowell 3 Son — Iowa
22 Nathan Crowell 2 Son — Iowa
23 James Butt 62 Head — Indiana
24 Goldie Butt 53 Wife — Iowa
25 Edna Butt 17 Son — Iowa
26 Benjamin Clark 87 Head — Ohio
27 Florence Duncan 65 Head — Iowa
28 William Duncan THIS PERSON 31 Son — Iowa
29 Richard Ames 62 Head Thresher Iowa
30 Ellen Ames 85 Wife — Illinois
31 Loyd Michle 26 Head — Iowa
32 Paul Davenport 26 Head — Wyoming

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Pedigree Summary

William
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)

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