JG
John Gross — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Calvert-County, Maryland
Our Model Tree links this John Gross across the 1930 and 1940 US Censuses in Calvert-County, Maryland (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 11-person household.
Age 21
b. ~1919
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Calvert-County, Maryland |
| Surname | Gross |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | First Election District |
| 1935 Residence (County) | Calvert |
| Additional Details | |
| Occupation | Oyster shucker |
| Industry | Oyster packing house |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 38 |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Oyster Shucker |
| Township / Ward | First Election District |
| Est. Birth Year | ~1919 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Gross | Son | — | 21 | ~1919 |
| Violet Gross | Daughter | — | 15 | ~1925 |
| Althea Gross | Daughter | — | 7 | ~1933 |
| Thelma Gross | Son | — | 27 | ~1913 |
| Orie Gross | Head | — | 50 | ~1890 |
| Martha Gross | Spouse | — | 47 | ~1893 |
| Robert Gross | Son | — | 17 | ~1923 |
| Oliver Gross | Son | — | 11 | ~1929 |
| Annie Gross | Daughter | — | 18 | ~1922 |
| Eugene Gross | Son | — | 20 | ~1920 |
| Clara Gross | Daughter | — | 8 | ~1932 |
Census Appearances
1930
Calvert, Maryland
Son, age 11
Calvert, Maryland · implied b. ~1919 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gross |
| Given Name | John F |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Calvert-County, Maryland
Son, age 21
Calvert-County, Maryland · implied b. ~1919 — 11 household members
| Surname | Gross |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | First Election District |
| 1935 Residence (County) | Calvert |
| Occupation | Oyster shucker |
| Industry | Oyster packing house |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 38 |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Gross
Son · 1940 · age 21 · b. ~1919 · Maryland
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Sibling
Annie Gross
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Althea Gross
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clara Gross
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Violet Gross
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Gross
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Oliver Gross
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thelma Gross
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Gross
Sibling · 1940 · age 20
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 — Calvert-County, Maryland
Open full size
1940 US Federal Census — Calvert-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01543-00099)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Annie Foote | 30 | Wife | — | Maryland |
| 42 | Archie Foote | 20 | Son | Shucker | Maryland |
| 43 | Daniel Foote | 18 | Son | Oyster Shucker | Maryland |
| 44 | Philip Foote | 14 | Son | — | Maryland |
| 45 | Fleetwood Foote | 12 | Son | — | Maryland |
| 46 | Eleanor Foote | 7 | Daughter | — | Maryland |
| 47 | Orie Gross | 50 | Head | Waterman | Maryland |
| 48 | Martha Gross | 47 | Wife | — | Maryland |
| 49 | John F. Gross THIS PERSON | 21 | Son | Oyster Shucker | Maryland |
| 50 | Thelma Gross | 27 | Son | Oyster Shucker | Maryland |
| 51 | Eugene Gross | 20 | Son | Oyster Shucker | Maryland |
| 52 | Annie Gross | 18 | Daughter | — | Maryland |
| 53 | Robert Gross | 17 | Son | Oyster Shucker | Maryland |
| 54 | Violet Gross | 15 | Daughter | — | Maryland |
| 55 | Oliver Gross | 11 | Son | — | Maryland |
| 56 | Clara Gross | 8 | Daughter | — | Maryland |
| 57 | Althea Gross | 7 | Daughter | — | Maryland |
| 58 | Grace Foote | 43 | Head | Cook | Maryland |
| 59 | Berton Foote | 24 | Son | Oyster Shucker | Maryland |
| 60 | Eddie Johnson | 50 | Head | Waterman | Maryland |
| 61 | Lyman Johnson | 19 | Son | Waterman | Maryland |
| 62 | Clyton Johnson | 36 | Head | Waterman | Maryland |
| 63 | Mary Johnson | 37 | Wife | House Wife | Maryland |
| 64 | Allen Smith | 12 | Adopted | — | Maryland |
| 65 | Drucilla Johnson | 74 | Head | — | Maryland |
| 66 | Ella May Johnson | 19 | Gr Daughter | — | Maryland |
| 67 | Alexander Johnson | 59 | Head | Waterman | Maryland |
| 68 | Sarah Johnson | 36 | Wife | Servant | Maryland |
| 69 | Elizabeth Johnson | 18 | Daughter | — | Maryland |
| 70 | Alexander Johnson | 16 | Son | — | Maryland |
| 71 | Ruth Johnson | 15 | Daughter | — | Maryland |
| 72 | William Barrett | 29 | Head | Farmer | Maryland |
| 73 | Marie Barrett | 22 | Wife | — | Maryland |
| 74 | William Jr Barrett | 2 | Son | — | Maryland |
| 75 | Gloria L. Barrett | 1 | Daughter | — | Maryland |
| 76 | Head Nathan | None | M | Oyster - Crab | — |
| 77 | Annette Nathan | 36 | Wife | — | Maryland |
| 78 | Eugene Nathan | 17 | Son | Waterman | Maryland |
| 79 | Marie Nathan | 15 | Daughter | — | Maryland |
| 80 | Violet Nathan | 14 | Daughter | — | Maryland |
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)