Robert Arnold — 1940 US Census Record

Model Tree available

1940 United States Federal Census · Sullivan-County, Indiana

Our Model Tree links this Robert Arnold across the 1920, 1930 and 1940 US Censuses in Sullivan-County, Indiana (XGBoost, ~Confirmed), with identified parents Lewis & Mary — first a head (b.~1909), then head of a 4-person household.

Age 31 b. ~1909 Male Head Born: Indiana Married

1940 Census Record Details

Census Year	1940
Location	Sullivan-County, Indiana
Surname	Arnold
Given Name	Robert
Relationship to Head	Head
Sex	M
Color / Race	White
Age	31
Marital Status	Married
Birthplace	Indiana
1935 Residence (City)	Sullivan
Additional Details
Occupation	Laborer
Industry	Mine
Class of Worker	PW
Hours Worked	64
Income (1939)	510
Highest Grade	Hs 4
1935 Residence	Indiana
Birth State	Indiana
Birth Country	United States
Birthplace (normalized)	indiana
Occupation	Laborer
Township / Ward	Dugger 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.

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

Name	Relation to head	Relative to Robert	Age	Birth yr
Violet Arnold	Spouse	—	27	~1913
Robert Arnold	Head	—	31	~1909
Robert Arnold	Son	—	9	~1931
Barbara Arnold	Daughter	—	6	~1934

Census Appearances

1920

Sullivan, Indiana

Son, age 11

Sullivan, Indiana · implied b. ~1909 — 9 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Arnold
Given Name	Robert
Relationship to Head	Son
Sex	M
Color / Race	White
Age	11
Marital Status	Single
Birthplace	Indiana
Father's Birthplace	Iowa
Mother's Birthplace	Illinois
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Indiana
Birth Country	United States
Birthplace (normalized)	indiana

1930

Sullivan, Indiana

Head, age 21

Sullivan, Indiana · implied b. ~1909 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Arnold
Given Name	Robert G
Relationship to Head	Head
Sex	M
Color / Race	White
Age	21
Marital Status	Married
Birthplace	Indiana
Age at First Marriage	20
Father's Birthplace	Iowa
Mother's Birthplace	Illinois
Occupation	Laborer
Industry	Factory
Class of Worker	W
Can Read/Write	Yes
Home Owned/Rented	R
Home Value / Rent	4
Birth State	Indiana
Birth Country	United States
Birthplace (normalized)	indiana

1940

Sullivan-County, Indiana

Head, age 31

Sullivan-County, Indiana · implied b. ~1909 — 4 household members

Surname	Arnold
Given Name	Robert
Relationship to Head	Head
Sex	M
Color / Race	White
Age	31
Marital Status	Married
Birthplace	Indiana
1935 Residence (City)	Sullivan
Occupation	Laborer
Industry	Mine
Class of Worker	PW
Hours Worked	64
Income (1939)	510
Highest Grade	Hs 4
1935 Residence	Indiana
Birth State	Indiana
Birth Country	United States
Birthplace (normalized)	indiana

Model Tree

Model Tree available

Our Model Tree links Robert Arnold across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Lewis Arnold (~0.92 confidence) and mother Mary Arnold (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.

Show:

Gen 1 Parents confidence ≈ 0.92

Father

Lewis Arnold

b. ~1875

Source father

● Household · direct · ~0.92

Mother

Mary Arnold

b. ~1875

Source mother

● Household · direct · ~0.92

This person

Anchor record

Robert Arnold

Head · 1940 · age 31 · b. ~1909 · Indiana

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Confirmed / household (~0.90+) Probable / derived (~0.65–0.89) Candidate (<0.65, unverified)

Original Census Page

1940 US Federal Census — Sullivan-County, Indiana Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01097-00007)

Line	Name	Age	Relation	Occupation	Birthplace
41	Archie Smith	21	Son	New Worker	Indiana
42	Mary Ethel Smith	18	Daughter	New Worker	Indiana
43	Jack Smith	15	Son	—	Indiana
44	Rachel Critchfield	53	Head	—	Indiana
45	Edna Critchfield	21	Daughter	House Work	Indiana
46	John Critchfield	19	Son	Labor	Indiana
47	Robert Critchfield	14	Son	—	Indiana
48	Betty Critchfield	11	Daughter	—	Indiana
49	Robert O. Gambill	58	Head	Representative Labor	Indiana
50	Kitty Gambill	56	Wife	—	Indiana
51	Donald L. Gambill	24	Head	Laborer	Indiana
52	Eva Gambill	22	Wife	—	Indiana
53	Donald G. Gambill	3	Son	—	Indiana
54	Sandra Gambill	1	Daughter	—	Indiana
55	Robert Arnold THIS PERSON	31	Head	Laborer	Indiana
56	Violet Arnold	27	Wife	—	Indiana
57	Robert Jr. Arnold	9	Son	—	Indiana
58	Barbara Arnold	6	Daughter	—	Indiana
59	Stanley Frazier	28	Head	Brakeman	Indiana
60	Dortha Frazier	24	Wife	—	Indiana
61	Diane Frazier	2	Daughter	—	Indiana
62	Phillip Frazier	1	Son	—	Indiana
63	Donald Moody	25	Head	Laborer	Indiana
64	Esther Moody	28	Wife	—	Indiana
65	Robert Moody	5	Son	—	Indiana
66	Lowell Moody	3	Son	—	Indiana
67	Mary Moody	1	Daughter	—	Indiana
68	Steve Gall	55	Head	Coal Miner	Hungary
69	Barbara Gall	52	Wife	—	Hungary
70	Martha Mccullough	2	Daughter	—	Indiana
71	James Hickman	42	Head	Coal Miner	Kentucky
72	Thelma Hickman	39	Wife	—	Indiana
73	Johnny Hickman	19	Son	—	Indiana
74	Ditha Tipton	80	Mother	—	Indiana
75	Clarrel Davis	54	Head	Bartender	Washington
76	May Davis	46	Wife	—	Tennessee
77	June Davis	12	Daughter	—	Indiana
78	James Hall	55	Head	Coal Miner	Scotland
79	Romenil Hall	53	Wife	—	Holland
80	Eugene Reeves	26	Head	Coal Miner	Indiana

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Pedigree Summary

Robert

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 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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