RD
Roy Davis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Roy Davis across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Mary & Meyer — first a head (b.~1910), then head of a 3-person household.
Age 30
b. ~1910
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Davis |
| Given Name | Roy |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Salesman |
| Industry | Paint Supplies |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Salesman |
| Township / Ward | Chicago |
| 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 Roy | Age | Birth yr |
|---|---|---|---|---|
| Marcia Davis | Daughter | — | 2 | ~1938 |
| Roy Davis | Head | — | 30 | ~1910 |
| Helen Davis | Spouse | — | 29 | ~1911 |
Census Appearances
1920
Cook, Illinois
Son, age 9
Cook, Illinois · implied b. ~1911 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Roy |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 19
Cook, Illinois · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Roy |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Salesman |
| Industry | Paint Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 30
Cook-County, Illinois · implied b. ~1910 — 3 household members
| Surname | Davis |
| Given Name | Roy |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Salesman |
| Industry | Paint Supplies |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Roy Davis across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mary Davis (~0.92 confidence) and father Meyer Davis (~0.92 confidence) and mother Anna Davis (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Davis
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
Meyer Davis
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Anna Davis
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Roy Davis
Head · 1940 · age 30 · b. ~1910 · Illinois
★ 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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01011-00127)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Boege | 27 | Head | Reporter | Illinois |
| 2 | Frances Boege | 29 | Wife | Clerk | Illinois |
| 3 | Walter Jung | 37 | Head | Accountant | Germany |
| 4 | Gretel Jung | 33 | Wife | — | Germany |
| 5 | Charles Hertig | 37 | Head | Draftsman | Illinois |
| 6 | Agnes Hertig | 36 | Wife | Stenographer | Illinois |
| 7 | Gilbert Stock | 31 | Head | Salesman | Missouri |
| 8 | Bessie Stock | 27 | Wife | — | Missouri |
| 9 | Joseph Frei | 47 | Head | Cosmetology | Germany |
| 10 | John Cannon | 77 | Head | — | Eire |
| 11 | Anna Cannon | 67 | Wife | — | Eire |
| 12 | Robert Cannon | 25 | Son | Assembler | Illinois |
| 13 | Here Ends Block 9 And Begins Block 10 | None | — | — | — |
| 14 | Carl Eckel | 36 | Head | Meat Smoker | Germany |
| 15 | Katherine Bows | 32 | Housekeeper | Housekeeper | Germany |
| 16 | Frances Bows | 5 | Daughter | — | — |
| 17 | John H. Swanson | 25 | Head | Manager | Illinois |
| 18 | Aileen Swanson | 26 | Wife | — | Illinois |
| 19 | Joan D. Swanson | 1 | Daughter | — | — |
| 20 | Henry Friedrich | 59 | Head | Pressman | Illinois |
| 21 | Elsie Friedrich | 60 | Wife | — | Illinois |
| 22 | Dorothy Bird | 24 | — | Saleslady | Illinois |
| 23 | Charlotte Smith | 58 | Sister in law | — | Illinois |
| 24 | Harvey Reeves | 40 | Nephew | Entertainer | Illinois |
| 25 | Fred Struck | 58 | Head | Bookkeeper | Illinois |
| 26 | Caroline Struck | 54 | Wife | — | Illinois |
| 27 | Harriet Struck | 26 | Daughter | Typist | Illinois |
| 28 | Harry Johnson | 38 | Head | Photo Engraver | Illinois |
| 29 | Anne Johnson | 34 | Wife | — | Wisconsin |
| 30 | Daniel Ziebel | 57 | Head | Bookkeeper | Wisconsin |
| 31 | Ida Ziebel | 54 | Wife | — | Wisconsin |
| 32 | Earl Senford | 27 | Step son | Weaver | Wisconsin |
| 33 | Jean Senford | 26 | Daughter in law | Stenographer | Illinois |
| 34 | Rose Kipkowski | 50 | Lodger | Office Clerk | Illinois |
| 35 | Ida Silver | 53 | Head | — | Russia |
| 36 | Bernard Silver | 20 | Son | — | Illinois |
| 37 | Roy Davis THIS PERSON | 30 | Head | Salesman | Illinois |
| 38 | Helen Davis | 29 | Wife | — | Illinois |
| 39 | Marcia Davis | 2 | Daughter | — | — |
| 40 | Walter J. Dowling | 62 | Head | Conductor | Illinois |
Pedigree Summary
Roy
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)