JJ
James Jones — 1940 US Census Record
Model Tree available1940 United States Federal Census · Johnson-County, Iowa
Our Model Tree links this James Jones across the 1920, 1930 and 1940 US Censuses in Johnson-County, Iowa (XGBoost, ~Confirmed), with identified parents Fred & Fred — first a son (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Johnson-County, Iowa |
| Surname | Jones |
| Given Name | James A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Iowa City |
| 1935 Residence (County) | Johnson |
| Additional Details | |
| Occupation | Extra |
| Industry | Dept. Store |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 360 |
| Highest Grade | C-3 |
| 1935 Residence | Same Place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Extra |
| Township / Ward | Iowa City |
| Est. Birth Year | ~1918 |
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 |
|---|---|---|---|---|
| Fred Jones | Head | — | 46 | ~1894 |
| James Jones | Son | — | 22 | ~1918 |
| Lillian Jones | Spouse | — | 47 | ~1893 |
Census Appearances
1920
Johnson, Iowa
Son, age 1
Johnson, Iowa · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jones |
| Given Name | James A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Johnson, Iowa
Son, age 12
Johnson, Iowa · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jones |
| Given Name | James A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Johnson-County, Iowa
Son, age 22
Johnson-County, Iowa · implied b. ~1918 — 3 household members
| Surname | Jones |
| Given Name | James A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Iowa City |
| 1935 Residence (County) | Johnson |
| Occupation | Extra |
| Industry | Dept. Store |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 360 |
| Highest Grade | C-3 |
| 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 Jones across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Fred Jones (~0.92 confidence) and father Fred Jones (~0.92 confidence) and father Fred Jones (~0.92 confidence) and mother Lillian Jones (~0.92 confidence) and mother Lillian Jones (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Fred Jones
b. ~1894
Source father
● Household
· direct · ~0.92
Father
Fred Jones
b. ~1894
Source father
● Household
· direct · ~0.92
Father
Fred Jones
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Lillian Jones
b. ~1893
Source mother
● Household
· direct · ~0.92
Mother
Lillian Jones
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Jones
Son · 1940 · age 22 · b. ~1918 · 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 — Johnson-County, Iowa
Open full size
1940 US Federal Census — Johnson-County, Iowa
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01171-00471)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Shirley A. Looney | 3 | Daughter | — | Iowa |
| 42 | Harry J. Mayal | 63 | Head | Salesman | Pennsylvania |
| 43 | Iva R. Mayal | 60 | Wife | — | Iowa |
| 44 | Cornell H. Mayal | 18 | Son | — | Iowa |
| 45 | Edward R. Griffin | 55 | Head | Teamster | Iowa |
| 46 | Mary A. Griffin | 51 | Wife | — | Iowa |
| 47 | Elaine J. Griffin | 23 | Daughter | Nurse | Iowa |
| 48 | Ambrose C. Griffin | 17 | Son | Waiter | Iowa |
| 49 | Frank Griffin | 15 | Son | Ass'T Manager | Iowa |
| 50 | Leona P. Pearson | 60 | Head | — | Iowa |
| 51 | Charles Mahoney | 51 | Head | Laborer | Iowa |
| 52 | Margaret Mahoney | 50 | Wife | Laborer | Iowa |
| 53 | Lavone Mahoney | 23 | Daughter | Stenographer | Iowa |
| 54 | Keith B. Fillmore | 22 | Head | Statistical Dept | Iowa |
| 55 | Martha E. Fillmore | 20 | Wife | Waitress | Iowa |
| 56 | Milla A. Russell | 75 | Head | — | Iowa |
| 57 | Albert W. Riche | 44 | Head | Laborer | Iowa |
| 58 | Marguerite B. Riche | 40 | Wife | Clerk | Iowa |
| 59 | James Mcfadden | 64 | Head | Salesman | Iowa |
| 60 | Anna Mcfadden | 53 | Wife | — | Iowa |
| 61 | Helen Clark | 30 | Daughter | Salesman | Iowa |
| 62 | Shirley A. Clark | 5 | Granddaughter | — | Iowa |
| 63 | Mary C. Clark | 1 | Granddaughter | — | Iowa |
| 64 | Edward J. Steidl | 76 | Head | — | Missouri |
| 65 | Clara Steidl | 71 | Wife | — | Wisconsin |
| 66 | Emma E. Hauke | 76 | Head | — | Iowa |
| 67 | John H. Voss | 59 | Head | Dentist | Iowa |
| 68 | Ella H. Voss | 54 | Wife | — | Iowa |
| 69 | Dorothy M. Voss | 23 | Daughter | Secretarial | Iowa |
| 70 | Herman W. Cargill | 35 | Head | Salesman | Illinois |
| 71 | Charlotte Y. Cargill | 36 | Wife | — | Iowa |
| 72 | Howard A. Snyder | 33 | Head | Instructor | Iowa |
| 73 | Alice L. Snyder | 25 | Wife | — | Iowa |
| 74 | Norman W. Benson | 35 | Head | Surveyor | Illinois |
| 75 | R. Marie Benson | 32 | Wife | — | Illinois |
| 76 | Fred E. Jones | 46 | Head | Ambulance Driver | Iowa |
| 77 | Lillian E. Jones | 47 | Wife | — | Iowa |
| 78 | James A. Jones THIS PERSON | 22 | Son | Extra | Iowa |
Pedigree Summary
James
Gen 1 · 5 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)