WG
William Gross — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Calvert, Maryland
Our Model Tree links this William Gross across the 1920, 1930 and 1940 US Censuses in Calvert, Maryland (XGBoost, ~Confirmed) — first a head (b.~1871), then head of a 6-person household.
Age 59
b. ~1871
Male
Head
Born: Maryland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Calvert, Maryland |
| Surname | Gross |
| Given Name | William D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 24 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Occupation | Labour |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Labour |
| Township / Ward | 1 Dist 2 Prct |
| Est. Birth Year | ~1871 |
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 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Sarah Gross | Other | — | 10 | ~1920 |
| Sarah Gross | Spouse | — | 52 | ~1878 |
| Thomas Gross | Son | — | 18 | ~1912 |
| George Gross | Other | — | 8 | ~1922 |
| William Gross | Head | — | 59 | ~1871 |
| Clarence Gross | Son | — | 20 | ~1910 |
Census Appearances
1920
Calvert, Maryland
Head, age 49
Calvert, Maryland · implied b. ~1871 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gross |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | O |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Calvert, Maryland
Head, age 59
Calvert, Maryland · implied b. ~1871 — 6 household members
| Surname | Gross |
| Given Name | William D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 24 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Labour |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Calvert-County, Maryland
Head, age 64
Calvert-County, Maryland · implied b. ~1876 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gross |
| Given Name | Willie |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Calvert |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 246 |
| Highest Grade | No 2 |
| 1935 Residence | Maryland |
| 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 William Gross across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Gross
Head · 1930 · age 59 · b. ~1871 · Maryland
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Calvert, Maryland
Open full size
1930 US Federal Census — Calvert, Maryland
Page Contents
50 people indexed on this census page (ia:1930:15thcensus871unit:0617)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Susie A. Washington | 0 | Daughter | — | Maryland |
| 2 | William D. Gross THIS PERSON | 59 | Head | Labour | Maryland |
| 3 | Sarah E. Gross | 52 | Wife | — | Maryland |
| 4 | Clarence Gross | 20 | Son | Labour | Maryland |
| 5 | Thomas Gross | 18 | Son | Labour | Maryland |
| 6 | Sarah Gross | 10 | Grand D. | — | Maryland |
| 7 | George Gross | 8 | Grand S. | — | Maryland |
| 8 | John H. Mitchell | 26 | Head | Labour | Maryland |
| 9 | Gladis B. Mitchell | 22 | Wife | Servant | Maryland |
| 10 | Cassie Mitchell | 14 | Niece | — | Maryland |
| 11 | Irving B. Mitchell | 12 | Nephew | — | Maryland |
| 12 | Jessie Williams | 66 | Head | — | Maryland |
| 13 | Leroy B. Williams | 28 | Son | Farmer | Maryland |
| 14 | Hellen Williams | 23 | Niece | — | Maryland |
| 15 | William A. Brooks | 49 | Head | Farmer | Maryland |
| 16 | Mary F. Brooks | 34 | Wife | — | Maryland |
| 17 | Sardella Brooks | 17 | Daughter | — | Maryland |
| 18 | Beaufort Brooks | 16 | Son | Labour | Maryland |
| 19 | Beatrice Brooks | 13 | Daughter | — | Maryland |
| 20 | Margaret Johnson | 65 | Head | — | Maryland |
| 21 | W. Blackburn | 51 | Head | Farming | Maryland |
| 22 | Madeline Blackburn | 16 | Daughter | — | Maryland |
| 23 | Edwin Blackburn | 14 | Son | — | Maryland |
| 24 | W. J. Trulson | 51 | Head | Watchman | Virginia |
| 25 | Agnes L. J. Trulson | 52 | Wife | — | Virginia |
| 26 | Lucille Evans | 17 | Foster D. | — | Maryland |
| 27 | Warner Johnson | 34 | Head | Waterman | Maryland |
| 28 | Preston Johnson | 26 | Bro | Labour | Maryland |
| 29 | Philip Johnson | 24 | Bro | — | Maryland |
| 30 | Ernest Gray | 67 | Head | — | Maryland |
| 31 | Cassie B. Gray | 24 | Daughter | — | Maryland |
| 32 | Rozenan A. Gray | 41 | Head | Carpenter | Maryland |
| 33 | Theol Gray | 17 | Daughter | — | Maryland |
| 34 | David Gray | 16 | Son | — | Maryland |
| 35 | Henrietta Gray | 14 | Daughter | — | Maryland |
| 36 | Dorothy Gray | 10 | Daughter | — | Maryland |
| 37 | Jessie Gray | 12 | Daughter | — | Maryland |
| 38 | Herman Gray | 8 | Son | — | Maryland |
| 39 | Virginia Gray | 9 | Daughter | — | Maryland |
| 40 | Frederick Gray | 5 | Son | — | Maryland |
| 41 | Hellen Gray | 2 | Daughter | — | Maryland |
| 42 | Harry L. H. Gray | 39 | Head | Chauffeur | Maryland |
| 43 | Ida E. Gray | 34 | Wife | — | Maryland |
| 44 | Morris B. Gray | 15 | Son | — | Maryland |
| 45 | Emma E. Gray | 13 | Daughter | — | Maryland |
| 46 | Naomi M. Gray | 11 | Daughter | — | Maryland |
| 47 | Harry C. Gray | 9 | Son | — | Maryland |
| 48 | Mildred B. Gray | 5 | Daughter | — | Maryland |
| 49 | Lawrence C. Gray | 3 | Son | — | Maryland |
| 50 | Myrtle I. Gray | 2 | Daughter | — | Maryland |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)