JG
John Gross — 1940 US Census Record
Model Tree available1940 United States Federal Census · Moody-County, South Dakota
Our Model Tree links this John Gross across the 1920, 1930 and 1940 US Censuses in Moody-County, South Dakota (XGBoost, ~Confirmed), with identified parents John & Mary — first a head (b.~1907), then head of a 6-person household.
Age 33
b. ~1907
Male
Head
Born: South Dakota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Moody-County, South Dakota |
| Surname | Gross |
| Given Name | John Jr. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | South Dakota |
| 1935 Residence (City) | Enterprise Township |
| 1935 Residence (County) | Moody |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 65 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Occupation | Farmer |
| Township / Ward | Enterprise Township |
| Est. Birth Year | ~1907 |
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 |
|---|---|---|---|---|
| Martha Gross | Spouse | — | 33 | ~1907 |
| Dorothy Gross | Daughter | — | 7 | ~1933 |
| Bernice Gross | Daughter | — | 9 | ~1931 |
| Betty Gross | Daughter | — | ~1940 | |
| Lois Gross | Daughter | — | 3 | ~1937 |
| John Gross | Head | — | 33 | ~1907 |
Census Appearances
1920
Murray, South …
Son, age 12
Murray, South Dakota · implied b. ~1908 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Groos |
| Given Name | John L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Germany |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1930
Moody, South …
Head, age 23
Moody, South Dakota · implied b. ~1907 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Groos |
| Given Name | John J |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | South Dakota |
| Age at First Marriage | 22 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Germany |
| Occupation | Farmer |
| Industry | general farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Moody-County, South …
Head, age 33
Moody-County, South Dakota · implied b. ~1907 — 6 household members
| Surname | Gross |
| Given Name | John Jr. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | South Dakota |
| 1935 Residence (City) | Enterprise Township |
| 1935 Residence (County) | Moody |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 65 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
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 Gross across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father John Groos (~0.92 confidence) and mother Mary Groos (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Groos
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Mary Groos
b. ~1874
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Gross
Head · 1940 · age 33 · b. ~1907 · South Dakota
★ 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 — Moody-County, South Dakota
Open full size
1940 US Federal Census — Moody-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03865-00093)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Richard Jorgensen | 3 | Son | — | South Dakota |
| 2 | Russell Jorgensen | 21 | Son | Farmer | South Dakota |
| 3 | Ray Hardie | 47 | Head | Farmer | Iowa |
| 4 | Eunice Hardie | 46 | Wife | Housekeeping | Nebraska |
| 5 | William Diekman | 32 | Head | Farm Laborer | South Dakota |
| 6 | Florence Diekman | 28 | Wife | — | Minnesota |
| 7 | Ina Williams | 43 | Head | Farmer | South Dakota |
| 8 | Stella Williams | 44 | Wife | — | South Dakota |
| 9 | Harriet Williams | 22 | Daughter | — | South Dakota |
| 10 | James Williams | 20 | Son | — | South Dakota |
| 11 | Roger Williams | 15 | Son | — | South Dakota |
| 12 | Martin Dueken | 54 | Brother-in-law | Farm Laborer | South Dakota |
| 13 | Arthur Bakken | 31 | Head | Farm Laborer | South Dakota |
| 14 | Sigrid Bakken | 30 | Wife | — | South Dakota |
| 15 | Betty Lou Bakken | 9 | Daughter | — | South Dakota |
| 16 | Edmund Michel | 40 | Head | Farmer | Nebraska |
| 17 | Mary Michel | 38 | Wife | — | Iowa |
| 18 | Ruth Michel | 15 | Daughter | — | South Dakota |
| 19 | Darlene Michel | 14 | Daughter | — | South Dakota |
| 20 | Wayne Michel | 12 | Son | — | South Dakota |
| 21 | Glenn Michel | 8 | Son | — | South Dakota |
| 22 | Shirley Michel | 4 | Daughter | — | South Dakota |
| 23 | Bernard Morey | 28 | Head | Farmer | South Dakota |
| 24 | Pearl Morey | 22 | Wife | — | South Dakota |
| 25 | Leo Schmidt | 35 | Head | Farmer | Wisconsin |
| 26 | Frances Schmidt | 27 | Wife | — | Iowa |
| 27 | Warren Schmidt | 0 | Son | — | South Dakota |
| 28 | Joseph Schmidt | 37 | Brother | Farmer | Wisconsin |
| 29 | John Jr. Gross THIS PERSON | 33 | Head | Farmer | South Dakota |
| 30 | Martha Gross | 33 | Wife | — | Iowa |
| 31 | Bernice Gross | 9 | Daughter | — | South Dakota |
| 32 | Dorothy Gross | 7 | Daughter | — | South Dakota |
| 33 | Lois Gross | 3 | Daughter | — | South Dakota |
| 34 | Betty Ann Gross | 0 | Daughter | — | South Dakota |
| 35 | Peter A. Lamberty | 58 | Head | Farmer | Iowa |
| 36 | Josephine Lamberty | 56 | Wife | — | Iowa |
| 37 | Lawrence Lamberty | 32 | Son | Farm Laborer | South Dakota |
| 38 | Susan Anna Lamberty | 29 | Daughter | — | South Dakota |
| 39 | Raymond M. Lamberty | 27 | Son | Farm Laborer | South Dakota |
| 40 | Wilbur Lamberty | 26 | Son | Farm Laborer | Iowa |
Pedigree Summary
John
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)