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William Dennis — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Marion-County, Iowa

Our Model Tree links this William Dennis across the 1930 and 1940 US Censuses in Marion-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 8-person household.

Age 15 b. ~1925 Male Son Born: Iowa Single

1940 Census Record Details

Census Year1940
LocationMarion-County, Iowa
SurnameDennis
Given NameWilliam A
Relationship to HeadSon
SexM
Color / RaceWhite
Age15
Marital StatusSingle
BirthplaceIowa
1935 Residence (City)Harvey Town
1935 Residence (County)Marion
Additional Details
Highest GradeHs 2
1935 ResidenceSame house
Birth StateIowa
Birth CountryUnited States
Birthplace (normalized)iowa
Township / WardHarvey Town
Est. Birth Year~1925

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.

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

Name Relation to head Relative to William Age Birth yr
Rodger Dennis Son — 3 ~1937
Paul Dennis Son — 13 ~1927
Wilhelmina Dennis Spouse — 42 ~1898
Lillian Dennis Daughter — 20 ~1920
Daniel Dennis Son — 7 ~1933
William Dennis Head — 41 ~1899
Edna Dennis Daughter — 18 ~1922
William Dennis Son — 15 ~1925

Census Appearances

1930
Marion, Iowa
Son, age 5
Marion, Iowa · implied b. ~1925 — 6 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Dennis
Given Name William A.
Relationship to Head Son
Sex M
Color / Race White
Age 5
Marital Status Single
Birthplace Iowa
Father's Birthplace Iowa
Mother's Birthplace Netherlands
Birth State Iowa
Birth Country United States
Birthplace (normalized) iowa
1940
Marion-County, Iowa
Son, age 15
Marion-County, Iowa · implied b. ~1925 — 8 household members
Surname Dennis
Given Name William A
Relationship to Head Son
Sex M
Color / Race White
Age 15
Marital Status Single
Birthplace Iowa
1935 Residence (City) Harvey Town
1935 Residence (County) Marion
Highest Grade Hs 2
1935 Residence Same house
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.
Linked across censuses
Our Model Tree links William Dennis across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Dennis
Son · 1940 · age 15 · b. ~1925 · Iowa
★ You are viewing this record
Sibling
Lillian Dennis
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edna Dennis
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rodger Dennis
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Dennis
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Dennis
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 — Marion-County, Iowa Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01181-00009)

Line Name Age Relation Occupation Birthplace
1 Katie Brucklander 52 Wife Housewife Iowa
2 Albert C Brucklander 15 Son New Worker Iowa
3 Nellie M Brucklander 12 Daughter — Iowa
4 Marion E Brucklander 5 Son — Iowa
5 Doris J Hoogland 18 Daughter Housemaid Iowa
6 Connie L Hoogland 1 Son — Iowa
7 Richard D Messamaker 56 Head Mining Iowa
8 George Staley 63 Head Housewife Iowa
9 Robert J Caswell 60 Head Mining Illinois
10 Jessie P Caswell 57 Wife Housewife Indiana
11 Everett O Schoonover 35 Head Pastor Iowa
12 Anna T Schoonover 36 Wife House Wife Iowa
13 Roy E Schoonover 11 Son — Montana
14 Orbra B Seery 21 Head Mining Iowa
15 Mildred D Seery 23 Wife Housewife Iowa
16 Keith L Seery 4 Son — Iowa
17 Henry C Miller 49 Head Mining Kansas
18 Oletha M Miller 45 Wife Housewife Kansas
19 Margaret M Miller 13 Daughter — Kansas
20 Irene F Miller 10 Daughter — Kansas
21 Chester P Mathews 28 Head Quarrying Iowa
22 Neva J Mathews 24 Wife Housewife Iowa
23 Lorane N Mathews 6 Daughter — Iowa
24 Eva M Mathews 5 Daughter — Iowa
25 Rozella M Mathews 3 Daughter — Iowa
26 William D Dennis 41 Head Station Agent Iowa
27 Wilhelmina K Dennis 42 Wife Housewife Iowa
28 Lillian A Dennis 20 Daughter Librarian Iowa
29 Edna M Dennis 18 Daughter Librarian Iowa
30 William A Dennis THIS PERSON 15 Son — Iowa
31 Paul E Dennis 13 Son — Iowa
32 Daniel D Dennis 7 Son — Iowa
33 Rodger L Dennis 3 Son — Iowa
34 Donald J White 26 Head Clay Laborer Iowa
35 Mary E White 25 Wife Housewife Iowa
36 Jacqueline V White 6 Daughter — Iowa
37 Floyd R Redding 44 Head Mining Iowa
38 Vivian L Redding 40 Wife Housewife Iowa
39 Edith A Redding 15 Daughter — Iowa
40 Merle J White 31 Head Foreman Iowa

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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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