DJ
Donald Jones — 1940 US Census Record
Model Tree available1940 United States Federal Census · Boulder-County, Colorado
Our Model Tree links this Donald Jones across the 1920, 1930 and 1940 US Censuses in Boulder-County, Colorado (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1916), then head of a 4-person household.
Age 24
b. ~1916
Male
Son
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Boulder-County, Colorado |
| Surname | Jones |
| Given Name | Donald T. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Longmont city |
| 1935 Residence (County) | Boulder |
| Additional Details | |
| Occupation | Clerk |
| Industry | County Office |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 1320 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Clerk |
| Township / Ward | Longmont City |
| Est. Birth Year | ~1916 |
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 Donald | Age | Birth yr |
|---|---|---|---|---|
| William Jones | Head | — | 66 | ~1874 |
| Robert Jones | Son | — | 16 | ~1924 |
| Donald Jones | Son | — | 24 | ~1916 |
| Minnie Jones | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Boulder, Colorado
Son, age 5
Boulder, Colorado · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jones |
| Given Name | Donald Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | England |
| Mother's Birthplace | South Dakota |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Boulder, Colorado
Son, age 15
Boulder, Colorado · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jones |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | England |
| Mother's Birthplace | South Dakota |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Boulder-County, Colorado
Son, age 24
Boulder-County, Colorado · implied b. ~1916 — 4 household members
| Surname | Jones |
| Given Name | Donald T. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Longmont city |
| 1935 Residence (County) | Boulder |
| Occupation | Clerk |
| Industry | County Office |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 1320 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 Donald Jones across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Jones (~0.92 confidence) and father William Jones (~0.92 confidence) and father William Jones (~0.92 confidence) and mother Minnie Jones (~0.92 confidence) and mother Minnie Jones (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Jones
b. ~1874
Source father
● Household
· direct · ~0.92
Father
William Jones
b. ~1875
Source father
● Household
· direct · ~0.92
Father
William Jones
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Minnie Jones
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Minnie Jones
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Donald Jones
Son · 1940 · age 24 · b. ~1916 · Colorado
★ You are viewing this record
Sibling
Robert Jones
Sibling · 1940 · age 16
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 — Boulder-County, Colorado
Open full size
1940 US Federal Census — Boulder-County, Colorado
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-00457-00974)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 2 | Harry Buckman | 60 | Head | Cooker | Nebraska |
| 3 | William D. Clark | 46 | Head | Cashier | Colorado |
| 4 | Nora Clark | 42 | Wife | — | Colorado |
| 5 | William W. Jones | 66 | Head | Road Worker | England |
| 6 | Minnie Jones | 57 | Wife | — | South Dakota |
| 7 | Donald T. Jones THIS PERSON | 24 | Son | Clerk | Colorado |
| 8 | Robert J. Jones | 16 | Son | — | Colorado |
| 9 | Zella H. Canis | 63 | Head | — | Colorado |
| 11 | Arthur W. Davis | 56 | Head | Assistant Foreman | Pennsylvania |
| 12 | Elizabeth Davis | 46 | Wife | — | Illinois |
| 13 | Betty Joyce Davis | 15 | Daughter | — | Colorado |
| 14 | George H. Ellicott | 46 | Head | Letter Carrier | Kansas |
| 15 | Verna Ellicott | 42 | Wife | — | Iowa |
| 16 | Clarice Ellicott | 19 | Daughter | Stenographer | Colorado |
| 17 | Vernon L. Ellicott | 18 | Son | Paper Carrier | Colorado |
| 18 | Sidney Ellicott | 15 | Son | 6 | Colorado |
| 19 | Geraldine Ellicott | 13 | Daughter | — | Colorado |
| 20 | Joan Ellicott | 4 | Daughter | — | Colorado |
| 21 | John E. Tordoff | 53 | Head | Mechanic | Nebraska |
| 22 | Leona M. Tordoff | 50 | Wife | Music Teacher | Nebraska |
| 23 | John J. Tordoff | 20 | Son | Jeweler | Nebraska |
| 24 | Kathleen Tordoff | 16 | Daughter | — | Nebraska |
| 25 | Arleen Tordoff | 16 | Daughter | — | Nebraska |
| 26 | Mary Ann Tordoff | 12 | Daughter | — | Colorado |
| 27 | T. Payton Mckean | 62 | Head | Plumber | Pennsylvania |
| 28 | Mary D. Mckean | 61 | Wife | — | Colorado |
| 29 | David W. Dobbins | 59 | Head | Realtor | Colorado |
| 30 | Jessie M. Dobbins | 54 | Wife | — | Kansas |
| 31 | Frank R. Tarr | 65 | Head | — | Missouri |
| 32 | Ruth S. Tarr | 65 | Wife | — | Missouri |
| 33 | Hale Tarr | 37 | Son | Attendant | Missouri |
| 34 | Thomas Allison | 60 | Head | Foreman | England |
| 35 | Anne Allison | 54 | Wife | — | Denmark |
| 36 | Hugh L. Large | 67 | Head | Realtor | Illinois |
| 37 | Lou Ellen Large | 60 | Wife | — | Colorado |
| 39 | Jennie Beckwith | 82 | Head | — | Massachusetts |
| 40 | Joanna Dudrow | 61 | Head | — | Colorado |
Pedigree Summary
Donald + 1 sibling
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)