JC
James Caldwell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Scott-County, Iowa
Our Model Tree links this James Caldwell across the 1920, 1930 and 1940 US Censuses in Scott-County, Iowa (XGBoost, ~Confirmed), with identified parents Lucile & Maurice — first a son (b.~1909), then head of a 4-person household.
Age 31
b. ~1909
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Scott-County, Iowa |
| Surname | Caldwell |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport City |
| 1935 Residence (County) | Scott |
| Additional Details | |
| Occupation | Salesman |
| Industry | Electrical Appliance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Salesman |
| Township / Ward | Davenport City |
| 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 James | Age | Birth yr |
|---|---|---|---|---|
| Maurice Caldwell | Head | — | 67 | ~1873 |
| Roland Caldwell | Son | — | 39 | ~1901 |
| James Caldwell | Son | — | 31 | ~1909 |
| Linnie Caldwell | Spouse | — | 65 | ~1875 |
Census Appearances
1920
Scott, Iowa
Son, age 11
Scott, Iowa · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Caldwell |
| Given Name | James M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Scott, Iowa
Son, age 21
Scott, Iowa · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Caldwell |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Illinois |
| Occupation | Salesman |
| Industry | Hardware |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Scott-County, Iowa
Son, age 31
Scott-County, Iowa · implied b. ~1909 — 4 household members
| Surname | Caldwell |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport City |
| 1935 Residence (County) | Scott |
| Occupation | Salesman |
| Industry | Electrical Appliance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | H 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.
Our Model Tree links James Caldwell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Lucile Caldwell (~0.92 confidence) and father Maurice Caldwell (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Lucile Caldwell
b. ~1873
Source mother
● Household
· direct · ~0.92
Father
Maurice Caldwell
b. ~1873
Source father
● Household
· direct · ~0.92
This person
Anchor record
James Caldwell
Son · 1940 · age 31 · b. ~1909 · Iowa
★ You are viewing this record
Sibling
Roland Caldwell
Sibling · 1940 · age 39
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 — Scott-County, Iowa
Open full size
1940 US Federal Census — Scott-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01202-00758)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Annie Lehman | 67 | wife | — | Germany |
| 2 | Albert Lehman | 25 | son | Operator | Iowa |
| 3 | Jacob Keller | 64 | Head | Cabinet Maker | Switzerland |
| 4 | Pauline Keller | 64 | wife | — | Switzerland |
| 5 | Ralph Bartschie | 40 | Head | Truck Driver | Iowa |
| 6 | Goldie Bartschie | 39 | wife | — | Iowa |
| 7 | Roland Bartschie | 15 | son | Newsboy | Iowa |
| 8 | Marian Bartschie | 12 | daughter | — | Iowa |
| 9 | Donald Bartschie | 8 | son | — | Iowa |
| 10 | Gloria Bartschie | 6 | daughter | — | Iowa |
| 11 | Betty Lou Bartschie | 0 | daughter | — | Iowa |
| 12 | William Miller | 31 | Head | Machinist | Tennessee |
| 13 | Sedonia Miller | 25 | wife | — | Illinois |
| 14 | William J. Miller | 3 | son | — | Illinois |
| 15 | Josiah A. Lyle | 44 | Head | — | Nebraska |
| 16 | John H. Gabriel | 48 | Head | Minister | Iowa |
| 17 | Maurice Caldwell | 67 | Head | Nya Project Supervisor | Ohio |
| 18 | Linnie Caldwell | 65 | wife | — | Illinois |
| 19 | Roland Caldwell | 39 | son | Machinist | Iowa |
| 20 | James Caldwell THIS PERSON | 31 | son | Salesman | Iowa |
| 21 | Cecilia Munchrath | 38 | Head | — | Iowa |
| 22 | Cornelia Munchrath | 36 | daughter | Stenographer | Iowa |
| 23 | Sidonia Munchrath | 35 | daughter | Stenographer | Iowa |
| 24 | Alphonse Kerrigan | 55 | Head | Machinist | Iowa |
| 25 | Julia Kerrigan | 55 | wife | — | Iowa |
| 26 | Julius Schmidt | 54 | Head | Superintendent | Russia |
| 27 | Elizabeth Schmidt | 50 | wife | — | Russia |
| 28 | Margaret Schmidt | 28 | daughter | Clerk | Illinois |
| 29 | Elizabeth Schmidt | 26 | daughter | — | Illinois |
| 30 | Charles Waller | 67 | Head | Bricklayer | Illinois |
| 31 | Julia Waller | 62 | wife | — | Germany |
| 32 | Theodore Mollie | 31 | Son-in-law | Clerk | Illinois |
| 33 | Clara Mollie | 28 | daughter | — | Illinois |
| 34 | Alfred Taylor | 72 | Head | Metal Polisher | Illinois |
| 35 | Mary Taylor | 67 | wife | — | Germany |
| 36 | Norma B. Taylor | 25 | daughter | — | Iowa |
| 37 | John Hall | 19 | Boarder | Apprentice Welder | Iowa |
| 38 | Edgar Ulrich | 38 | Head | Proprietor Service Station | Ohio |
| 39 | Beulah Ulrich | 34 | wife | — | Illinois |
| 40 | Beulah Ulrich | 4 | daughter | — | Iowa |
Pedigree Summary
James + 1 sibling
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)