RD
Robert Davidson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cascade-County, Montana
Our Model Tree links this Robert Davidson across the 1920, 1930 and 1940 US Censuses in Cascade-County, Montana (XGBoost, ~Confirmed), with identified parents William — first a head (b.~1909), then head of a 3-person household.
Age 31
b. ~1909
Male
Head
Born: Montana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cascade-County, Montana |
| Surname | Davidson |
| Given Name | Robert L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Montana |
| 1935 Residence (City) | Great Falls City |
| 1935 Residence (County) | Cascade |
| Additional Details | |
| Occupation | Salesman |
| Industry | Bakery |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1141 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Occupation | Salesman |
| Township / Ward | Great Falls City |
| Est. Birth Year | ~1909 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Gertrude Davidson | Spouse | — | 26 | ~1914 |
| Robert Davidson | Son | — | 2 | ~1938 |
| Robert Davidson | Head | — | 31 | ~1909 |
Census Appearances
1920
Cascade, Montana
Son, age 11
Cascade, Montana · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Michigan |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1930
Cascade, Montana
Son, age 22
Cascade, Montana · implied b. ~1908 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Robert L. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Michigan |
| Occupation | Truck driver |
| Industry | Bakery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Cascade-County, Montana
Head, age 31
Cascade-County, Montana · implied b. ~1909 — 3 household members
| Surname | Davidson |
| Given Name | Robert L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Montana |
| 1935 Residence (City) | Great Falls City |
| 1935 Residence (County) | Cascade |
| Occupation | Salesman |
| Industry | Bakery |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1141 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
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 Robert Davidson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Davidson (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Davidson
b. ~1878
Source father
● Household
· direct · ~0.92
This person
Anchor record
Robert Davidson
Head · 1940 · age 31 · b. ~1909 · Montana
★ 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 — Cascade-County, Montana
Open full size
1940 US Federal Census — Cascade-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02214-00802)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jay L. Mansell | 62 | Head | Fireman | Missouri |
| 2 | Lillian R. Mansell | 56 | Wife | — | Texas |
| 3 | Francis G. Lassen | 26 | Head | Station Attendant | Montana |
| 4 | Eleanor L. Lassen | 22 | Wife | Waitress | Montana |
| 5 | Gary F. Lassen | 0 | Son | — | — |
| 6 | Fifi Faustine Aquillete | 46 | Head | Cupola Helper | Italy |
| 7 | Alice Aquillete | 43 | Wife | Bookkeeper | North Dakota |
| 8 | Kendall A. Rinehart | 24 | Head | Salesman | Montana |
| 9 | Catherine C. Rinehart | 23 | Wife | — | Montana |
| 10 | Richard G. Rinehart | 1 | Son | — | — |
| 11 | Herbert L. Rinehart | 51 | Head | Proprietor | Michigan |
| 12 | Marie Rinehart | 50 | Wife | — | Northland |
| 13 | Robert L. Davidson THIS PERSON | 31 | Head | Salesman | Montana |
| 14 | Gertrude M. Davidson | 26 | Wife | — | Montana |
| 15 | Robert D. Davidson | 2 | Son | — | — |
| 16 | Harry Hanesty | 49 | Head | Salesman | Missouri |
| 17 | Margaret R. Hanesty | 45 | Wife | — | Minnesota |
| 18 | Robert M. Ab Hanesty | 20 | Son | — | Minnesota |
| 19 | Richard G. Hanesty | 14 | Son | — | Wisconsin |
| 20 | Louis O. Logren | 75 | Head | — | Canada |
| 21 | Almira M. Logren | 74 | Wife | — | Canada |
| 22 | Richard J. Christoferson | 56 | Head | Salesman | Sweden |
| 23 | Pearl A. Christoferson | 54 | Wife | — | Iowa |
| 24 | John R. Christoferson | 20 | Son | Salesman | Montana |
| 25 | Alice R. Christoferson | 18 | Daughter | Nurse'S Aid | Montana |
| 26 | Elizabeth L. Christoferson | 13 | Daughter | — | Montana |
| 27 | Lloyd W. Sorenson | 29 | Son-in-law | Salesman | Tennessee |
| 28 | Gladys Sorenson | 25 | Daughter | — | Montana |
| 29 | Richard Sorenson | 0 | Grandson | — | — |
| 30 | Thomas R. Daily | 26 | Head | Clerk | Montana |
| 31 | Annie M. Daily | 26 | Wife | Nurse | Montana |
| 32 | Leslie R. Daily | 2 | Son | — | — |
| 33 | Jerome D. Daily | 1 | Son | — | — |
| 34 | George W. Steele | 36 | Head | Steward | Michigan |
| 35 | Mildred B. Steele | 35 | Wife | — | Montana |
| 36 | William Steele | 10 | Son | — | Montana |
| 37 | Barbara J. Steele | 6 | Daughter | — | Montana |
| 38 | Doris J. Steele | 4 | Daughter | — | Montana |
| 39 | Clarence S. Perry | 34 | Head | Representative | Wisconsin |
| 40 | Theresa A. Perry | 31 | Wife | — | Minnesota |
Pedigree Summary
Robert
Gen 1 · 1 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)