CJ
Cecil Jones — 1940 US Census Record
Model Tree available1940 United States Federal Census · Valley-County, Montana
Our Model Tree links this Cecil Jones across the 1920, 1930 and 1940 US Censuses in Valley-County, Montana (XGBoost, ~Confirmed), with identified parents Orville & Mary — first a son (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Male
Son
Born: Washington
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Valley-County, Montana |
| Surname | Jones |
| Given Name | Cecil Lee |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | School District 9 North |
| 1935 Residence (County) | Valley |
| Additional Details | |
| Occupation | Farm |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | H 8 |
| 1935 Residence | Same house |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Farm |
| Township / Ward | School District 9 North |
| 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 Cecil | Age | Birth yr |
|---|---|---|---|---|
| Cecil Jones | Son | — | 22 | ~1918 |
| Jean Jones | Son | — | 22 | ~1918 |
| Mary Jones | Head | — | 49 | ~1891 |
Census Appearances
1920
Valley, Montana
Son, age 2
Valley, Montana · implied b. ~1918
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Jones |
| Given Name | Cecil E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Michigan |
| Occupation | none |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
Valley, Montana
Son, age 12
Valley, Montana · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jones |
| Given Name | Cecil L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Canada |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
Valley-County, Montana
Son, age 22
Valley-County, Montana · implied b. ~1918 — 3 household members
| Surname | Jones |
| Given Name | Cecil Lee |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | School District 9 North |
| 1935 Residence (County) | Valley |
| Occupation | Farm |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | H 8 |
| 1935 Residence | Same house |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
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 Cecil Jones across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Orville Jones (~0.92 confidence) and mother Mary Jones (~0.92 confidence) and mother Mary Jones (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Orville Jones
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Mary Jones
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Mary Jones
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Cecil Jones
Son · 1940 · age 22 · b. ~1918 · Montana
★ You are viewing this record
Sibling
Jean Jones
Sibling · 1940 · age 22
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 — Valley-County, Montana
Open full size
1940 US Federal Census — Valley-County, Montana
Page Contents
5 people indexed on this census page (nara:1940:m-t0627-02233-00393)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Jones | 49 | Head | Farm | Washington |
| 2 | Jean E Jones | 22 | Son | Farm | Oregon |
| 3 | Cecil Lee Jones THIS PERSON | 22 | Son | Farm | Washington |
| 4 | Eamil O Frost Paul | 53 | Head | Farm Hand | Germany |
| 5 | Helge Larson | 55 | Hired Hand | Farm Hand | Norway |
Pedigree Summary
Cecil + 1 sibling
Gen 1 · 3 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)