JL
James Long — 1940 US Census Record
Model Tree available1940 United States Federal Census · Keokuk-County, Iowa
Our Model Tree links this James Long across the 1910, 1920, 1930 and 1940 US Censuses in Keokuk-County, Iowa (XGBoost, ~Confirmed), with identified parents Fred & Edyth — first a head (b.~1910), then head of a 3-person household.
Age 30
b. ~1910
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Keokuk-County, Iowa |
| Surname | Long |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Keokuk |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 50 |
| Highest Grade | H-4 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Richland Township |
| Est. Birth Year | ~1910 |
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 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Long | Head | — | 30 | ~1910 |
| Richard Long | Son | — | 7 | ~1933 |
| Florence Long | Spouse | — | 29 | ~1911 |
Census Appearances
1910
Keokuk, Iowa
Son, age
Keokuk, Iowa · implied b. ~1910 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Long |
| Given Name | James C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1920
Keokuk, Iowa
Son, age 10
Keokuk, Iowa · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Long |
| Given Name | James S. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Keokuk, Iowa
Son, age 20
Keokuk, Iowa · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Long |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Keokuk-County, Iowa
Head, age 30
Keokuk-County, Iowa · implied b. ~1910 — 3 household members
| Surname | Long |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Keokuk |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 50 |
| Highest Grade | H-4 |
| 1935 Residence | Iowa |
| 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 Long across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Fred Long (~0.92 confidence) and mother Edyth Long (~0.92 confidence) and father James Long (~0.92 confidence) and mother Lydia Long (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Fred Long
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Edyth Long
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
James Long
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Lydia Long
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Long
Head · 1940 · age 30 · b. ~1910 · 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 — Keokuk-County, Iowa
Open full size
1940 US Federal Census — Keokuk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01172-00930)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marie Rickard | 30 | Wife | — | Iowa |
| 42 | Phyllis Rickard | 3 | Daughter | — | — |
| 43 | Piarma|Piarmani Rickard | 0 | Daughter | — | — |
| 44 | Raymond Derby | 25 | Head | Farmer | Iowa |
| 45 | Varia Derby | 21 | Wife | — | Iowa |
| 46 | Warren Hill | 28 | Head | Farmer | Iowa |
| 47 | Vera Hill | 21 | Wife | — | Iowa |
| 48 | Ray Heilma | 48 | Head | Farmer | Iowa |
| 49 | Lora Heilma | 46 | Wife | — | Iowa |
| 50 | Arlene Heilma | 18 | Daughter | — | Iowa |
| 51 | Dave Dunning | 70 | Head | Farmer | Iowa |
| 52 | Minnie Dunning | 67 | Wife | — | Iowa |
| 53 | Arno Wunderlich | 71 | Head | Farmer | Iowa |
| 54 | Vera Wunderlich | 44 | Daughter | — | Iowa |
| 55 | Norma Wunderlich | 36 | Daughter | — | Iowa |
| 56 | Enid Wunderlich | 28 | Daughter | — | Iowa |
| 57 | John Ramsey | 66 | Head | Farmer | Iowa |
| 58 | Maud Ramsey | 64 | Wife | — | Iowa |
| 59 | James Long THIS PERSON | 30 | Head | Farmer | Iowa |
| 60 | Florence Long | 29 | Wife | — | Iowa |
| 61 | Richard Long | 7 | Son | — | Iowa |
| 62 | Howard Monaw | 47 | Head | Farmer | Iowa |
| 63 | Hildred Monaw | 42 | Wife | — | Iowa |
| 64 | Fay Monaw | 12 | Son | — | Iowa |
| 65 | Keith Monaw | 8 | Son | — | Iowa |
| 66 | John Hadley | 21 | Head | Farmer | Iowa |
| 67 | Jim Harniss | 42 | Head | Farmer | Iowa |
| 68 | Laura Harniss | 44 | Wife | — | Illinois |
| 69 | Anna Lou Harniss | 7 | Daughter | — | Iowa |
| 70 | Earldine Harniss | 2 | Son | — | Iowa |
| 71 | Long Sellars | 56 | Head | Farmer | Iowa |
| 72 | Deinas Sellars | 54 | Wife | — | Iowa |
| 73 | Clarence Greiner | 31 | Head | Farmer | Iowa |
| 74 | Gertrude Greiner | 28 | Wife | — | Iowa |
| 75 | Joseph Greiner | 6 | Son | — | Iowa |
| 76 | Betty Ann Greiner | 5 | Daughter | — | Iowa |
| 77 | Jennett Greiner | 3 | Daughter | — | Iowa |
| 78 | Margie Greiner | 1 | Daughter | — | Iowa |
| 79 | Claude Tampheen | 29 | Head | Labor | Iowa |
| 80 | Walo Tampheen | 25 | Wife | — | Iowa |
Pedigree Summary
James
Gen 1 · 4 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)