RD
Robert Davidson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hamilton-County, Ohio
Our Model Tree links this Robert Davidson across the 1930 and 1940 US Censuses in Hamilton-County, Ohio (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 9-person household.
Age 11
b. ~1929
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hamilton-County, Ohio |
| Surname | Davidson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cincinnati city |
| 1935 Residence (County) | Hamilton |
| Additional Details | |
| Highest Grade | No 2 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Cincinnati City |
| Est. Birth Year | ~1929 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Mitchell Davidson | Son | — | 15 | ~1925 |
| Wm Davidson | Son | — | 6 | ~1934 |
| Robert Davidson | Head | — | 48 | ~1892 |
| Earl Davidson | Son | — | 4 | ~1936 |
| James Davidson | Son | — | 20 | ~1920 |
| Minnie Davidson | Spouse | — | 46 | ~1894 |
| Francis Davidson | Daughter | — | 17 | ~1923 |
| Paul Davidson | Son | — | 9 | ~1931 |
| Robert Davidson | Son | — | 11 | ~1929 |
Census Appearances
1930
Hamilton, Ohio
Son, age 1
Hamilton, Ohio · implied b. ~1929 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Roy Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Hamilton-County, Ohio
Son, age 11
Hamilton-County, Ohio · implied b. ~1929 — 9 household members
| Surname | Davidson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cincinnati city |
| 1935 Residence (County) | Hamilton |
| Highest Grade | No 2 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Davidson
Son · 1940 · age 11 · b. ~1929 · Ohio
★ You are viewing this record
Sibling
Mitchell Davidson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Davidson
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Davidson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wm Davidson
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Earl Davidson
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Davidson
Sibling · 1940 · age 17
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 — Hamilton-County, Ohio
Open full size
1940 US Federal Census — Hamilton-County, Ohio
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-03193-00188)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 2 | Albert Van Der Ryt | 57 | Head | Wood Finisher | Holland |
| 3 | Mary Van Der Ryt | 54 | Wife | — | Ohio |
| 4 | Rose Mocklman | 57 | Head | Buy Cleaner | Ohio |
| 5 | Raymond Mocklman | 18 | Son | New Worker | Ohio |
| 6 | Evelyn Mocklman | 16 | Daughter | — | Ohio |
| 7 | Robert Davidson | 48 | Head | Laborer | Kentucky |
| 8 | Minnie Davidson | 46 | Wife | — | Kentucky |
| 9 | James Davidson | 20 | Son | New Worker | Kentucky |
| 10 | Francis Davidson | 17 | Daughter | — | Kentucky |
| 11 | Mitchell Davidson | 15 | Son | — | Kentucky |
| 12 | Robert Davidson THIS PERSON | 11 | Son | — | Ohio |
| 13 | Paul Davidson | 9 | Son | — | Ohio |
| 14 | Wm Davidson | 6 | Son | — | Ohio |
| 15 | Earl Davidson | 4 | Son | — | Ohio |
| 17 | Albert Marsch | 58 | Head | Mechanic | Minnesota |
| 18 | Eleanor Marsch | 56 | Wife | Housework | Kentucky |
| 19 | Eileen Marsch | 15 | Daughter | — | Ohio |
| 20 | Marion Marsch | 14 | Daughter | — | Ohio |
| 21 | Andrew Miller | 68 | Head | Machine Operator | Ohio |
| 22 | Vera Miller | 39 | Daughter | Ink Clerk | Ohio |
| 24 | Wm Climer | 33 | Head | Teacher | Ohio |
| 25 | Ruth Climer | 30 | Wife | — | Ohio |
| 26 | Mary Hofmann | 71 | Head | — | Kentucky |
| 27 | Emily Hofmann | 40 | Daughter | Telegraph Operator | Ohio |
| 28 | Anna Jacobs | 59 | Head | — | Ohio |
| 29 | Theo Leonard | 66 | Head | Real Estate Office | Missouri |
| 30 | Ottilie Leonard | 65 | Wife | — | Germany |
| 31 | Adelaide Leonard | 63 | Sister | — | Missouri |
| 32 | Maude Everett | 58 | Head | — | Ohio |
| 33 | John C Wilcox | 61 | Roomer | Credit Man | Iowa |
| 34 | Edmund Wilcox | 19 | Roomer | — | Illinois |
| 35 | Walter Honnell'S | 39 | Roomer | Chemist | Missouri |
| 36 | Ernie A Tarter | 34 | Roomer | Inspector | Kentucky |
| 37 | Edd Fair | 39 | Head | Barber | Kentucky |
| 38 | Chas Ehlers | 61 | Head | Proprietor | Ohio |
| 39 | Caroline Ehlers | 62 | Wife | — | Ohio |
| 40 | Ernest Stine | 37 | Head | Taxi Cab Driver | Kentucky |
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)