JD
John Davidson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Joseph-County, Michigan
Our Model Tree links this John Davidson across the 1920, 1930 and 1940 US Censuses in St.-Joseph-County, Michigan (XGBoost, ~Confirmed) — first a head (b.~1886), then head of a 6-person household.
Age 54
b. ~1886
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Joseph-County, Michigan |
| Surname | Davidson |
| Given Name | John X. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | White Pigeon |
| 1935 Residence (County) | Saint Joseph |
| Additional Details | |
| Occupation | Farmer |
| Industry | Own Farm |
| Class of Worker | OA |
| Hours Worked | 6 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Farmer |
| Township / Ward | White Pigeon |
| Est. Birth Year | ~1886 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Rosemary Berghetti | Daughter | — | 21 | ~1919 |
| John Davidson | Head | — | 54 | ~1886 |
| Margie Berghetti | Other | — | 3 | ~1937 |
| John Berghetti | Other | — | 25 | ~1915 |
| John Berghetti | Other | — | 1 | ~1939 |
| Florence Davidson | Spouse | — | 49 | ~1891 |
Census Appearances
1920
St Joseph, …
Head, age 34
St Joseph, Michigan · implied b. ~1886 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | DAVIDSON |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | General Farming |
| Industry | Farm |
| Class of Worker | Emp |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
St Joseph, …
Head, age 44
St Joseph, Michigan · implied b. ~1886 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | John W |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Indiana |
| Age at First Marriage | 27 |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | Farmer |
| Industry | Gen Farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
St.-Joseph-County, Michigan
Head, age 54
St.-Joseph-County, Michigan · implied b. ~1886 — 6 household members
| Surname | Davidson |
| Given Name | John X. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | White Pigeon |
| 1935 Residence (County) | Saint Joseph |
| Occupation | Farmer |
| Industry | Own Farm |
| Class of Worker | OA |
| Hours Worked | 6 |
| Income (1939) | 0 |
| Highest Grade | Hs 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 John Davidson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Davidson
Head · 1940 · age 54 · b. ~1886 · Michigan
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — St.-Joseph-County, Michigan
Open full size
1940 US Federal Census — St.-Joseph-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01817-00907)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lily Mandigo | 75 | Sister | — | Michigan |
| 2 | Frank W. Thomas | 70 | Head | President Of Co | Michigan |
| 3 | Nannie O. Thomas | 69 | Wife | — | Penna. |
| 4 | Zella Staley | 53 | Housekeeper | Housekeeper | Utah |
| 5 | Paul R. Wagner | 35 | Head | Farmer | Michigan |
| 6 | Laura Wagner | 37 | Wife | — | Michigan |
| 7 | John Wagner | 3 | Son | — | Michigan |
| 8 | Lester Carpenter | 28 | Lodger | Farm Laborer | Michigan |
| 9 | Paul Ireland | 33 | Head | Paper Maker | Ohio |
| 10 | Rosanna Ireland | 31 | Wife | — | Michigan |
| 11 | Dorothy Ireland | 13 | Daughter | — | Indiana |
| 12 | Marilyn Ireland | 12 | Daughter | — | Indiana |
| 13 | Mary Ireland | 10 | Daughter | — | Indiana |
| 14 | Kenneth Ireland | 7 | Son | — | Michigan |
| 15 | Shirley Ireland | 6 | Daughter | — | Michigan |
| 16 | Nancy Ireland | 4 | Daughter | — | Michigan |
| 17 | Lois Ireland | 2 | Daughter | — | Michigan |
| 18 | Ollie Yoder | 42 | Head | Paper Maker | Indiana |
| 19 | Opal Yoder | 39 | Wife | — | Indiana |
| 20 | Jay Yoder | 18 | Son | Gardener | Indiana |
| 21 | Bernice Yoder | 18 | Daughter | — | Indiana |
| 22 | Ernest Yoder | 15 | Son | — | Indiana |
| 23 | Fred Crampton | 72 | Head | Farmer | Michigan |
| 24 | Lella Crampton | 71 | Wife | — | Michigan |
| 25 | Helen Crampton | 43 | Daughter | — | Michigan |
| 26 | John X. Davidson THIS PERSON | 54 | Head | Farmer | Indiana |
| 27 | Florence Davidson | 49 | Wife | — | Indiana |
| 28 | John Berghetti | 25 | Son in law | Paper Maker | Michigan |
| 29 | Rosemary Berghetti | 21 | Daughter | — | Michigan |
| 30 | Margie Berghetti | 3 | Granddau. | — | Michigan |
| 31 | John Berghetti | 1 | Grandson | — | Michigan |
| 32 | Frank Ward | 55 | Head | Farmer | Indiana |
| 33 | Cora Ward | 50 | Wife | — | Indiana |
| 34 | Henry Grant | 62 | Lodger | Farmer | Indiana |
| 35 | Ernest Moore | 61 | Head | Farmer | Indiana |
| 36 | Mary Moore | 53 | Wife | — | Illinois |
| 37 | George Sifers | 30 | Son | — | Michigan |
| 38 | Forrest Bowman | 43 | Head | Carpenter | Indiana |
| 39 | Mildred Bowman | 27 | Wife | — | Michigan |
| 40 | Norma Bowman | 0 | Daughter | — | Indiana |
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)