RD
Robert Davidson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Robert Davidson across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents Lorena & Lorenz — first a son (b.~1916), then head of a 4-person household.
Age 24
b. ~1916
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Davidson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Factory Work |
| Class of Worker | PW |
| Hours Worked | 0 |
| Income (1939) | 44 |
| Highest Grade | No 4 |
| 1935 Residence | Same Place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Factory Work |
| Township / Ward | Indianapolis |
| 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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Davidson | Son | — | 24 | ~1916 |
| Dorothy Davidson | Daughter | — | 22 | ~1918 |
| Lorenz Davidson | Head | — | 49 | ~1891 |
| Wallace Davidson | Son | — | 27 | ~1913 |
Census Appearances
1920
Marion, Indiana
Son, age 4
Marion, Indiana · implied b. ~1916 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Son, age 14
Marion, Indiana · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Robert A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Son, age 24
Marion-County, Indiana · implied b. ~1916 — 4 household members
| Surname | Davidson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Occupation | Factory Work |
| Class of Worker | PW |
| Hours Worked | 0 |
| Income (1939) | 44 |
| Highest Grade | No 4 |
| 1935 Residence | Same Place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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: mother Lorena Davidson (~0.92 confidence) and father Lorenz Davidson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Lorena Davidson
b. ~1879
Source mother
● Household
· direct · ~0.92
Father
Lorenz Davidson
b. ~1891
Source father
● Household
· direct · ~0.92
This person
Anchor record
Robert Davidson
Son · 1940 · age 24 · b. ~1916 · Indiana
★ You are viewing this record
Sibling
Dorothy Davidson
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wallace Davidson
Sibling · 1940 · age 27
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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01124-00259)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elizabeth Craig | 27 | Housekeeper | Maid | Indiana |
| 2 | John Jr. Craig | 7 | Son | — | Indiana |
| 3 | John G. Heckman | 55 | Head | Machinist | Indiana |
| 4 | Bertha Heckman | 56 | Wife | — | Indiana |
| 5 | Marion Heckman | 28 | Son | Apprentice Book Binder | Indiana |
| 6 | Helen Heckman | 24 | Daughter-in-law | Comptometer Operator | Colorado |
| 7 | Lorenz Davidson | 49 | Head | Cook | Kentucky |
| 8 | Wallace Davidson | 27 | Son | Machinist | Indiana |
| 9 | Robert Davidson THIS PERSON | 24 | Son | Factory Work | Indiana |
| 10 | Dorothy Davidson | 22 | Daughter | Housekeeper | Indiana |
| 11 | Charles Price | 30 | Head | Hosiery Knitter | Indiana |
| 12 | Juanita Price | 31 | Wife | Transcribing Operator | Indiana |
| 13 | Robert Price | 8 | Son | — | Indiana |
| 14 | Lyle Wisenberg | 29 | Head | Salesman | Indiana |
| 15 | Florence Wisenberg | 26 | Wife | — | Indiana |
| 16 | Sue Ann Wisenberg | 1 | Daughter | — | Indiana |
| 17 | Earl Schriener | 26 | Head | Utility Man | Indiana |
| 18 | Juanita Schriener | 23 | Wife | — | Indiana |
| 19 | Thomas K. Schriener | 2 | Son | — | Indiana |
| 21 | Earnest Edney | 32 | Head | Truck Driver | Mississippi |
| 22 | Pauline Edney | 32 | Wife | Book-Keeper | Indiana |
| 23 | Margaret Ann Edney | 5 | Daughter | — | Indiana |
| 24 | Leroy Keister | 50 | Head | Collector | Indiana |
| 25 | Eula Keister | 46 | Wife | — | Kentucky |
| 26 | Robert Keister | 15 | Son | — | Indiana |
| 27 | Ray Collins | 43 | Head | Salesman | Ohio |
| 28 | Nola Collins | 37 | Wife | — | Illinois |
| 29 | Leo Collins | 15 | Son | — | Indiana |
| 30 | Frank Collins | 10 | Son | — | Indiana |
| 31 | Nancy Collins | 8 | Son | — | Indiana |
| 32 | Gustave Mayer | 58 | Head | Structural Iron Worker | Indiana |
| 33 | Mary L. Mayer | 60 | Wife | — | Indiana |
| 34 | Vernon Hudson | 49 | Head | City Fireman | Indiana |
| 35 | Amelia Hudson | 51 | Wife | — | Indiana |
| 36 | Sarah Stricker | 79 | Head | — | Illinois |
| 37 | Sara Stricker | 45 | Daughter | Chain Plater | Indiana |
| 38 | Wilbur Melle | 47 | Head | Tool & Dye Maker | Ohio |
| 39 | Clara Melle | 33 | Wife | — | Indiana |
| 40 | Elton Yannewehs | 34 | Head | Salesman | Indiana |
Pedigree Summary
Robert + 2 siblings
Gen 1 · 2 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)