MG
Mary Gross — 1940 US Census Record
Model Tree available1940 United States Federal Census · Calvert-County, Maryland
Our Model Tree links this Mary Gross across the 1920, 1930 and 1940 US Censuses in Calvert-County, Maryland (XGBoost, ~Confirmed), with identified parents Marguerite — first a daughter (b.~1866), then head of a 12-person household.
Age 74
b. ~1866
Female
Daughter
Born: Maryland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Calvert-County, Maryland |
| Surname | Gross |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 74 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| 1935 Residence (City) | Solomons Island |
| 1935 Residence (County) | Calvert |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Solomons Island |
| Est. Birth Year | ~1866 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Richard Parker | Son | — | 24 | ~1916 |
| Jean Gross | Other | — | 5 | ~1935 |
| Catherine Gross | Other | — | 3 | ~1937 |
| Blanche Wilson | Daughter | — | 35 | ~1905 |
| Celestine Gross | Other | — | 8 | ~1932 |
| Emma Gross | Daughter | — | 24 | ~1916 |
| Harriet Wilson | Other | — | 81 | ~1859 |
| Marguerite Wilson | Head | — | 55 | ~1885 |
| Lola Gross | Daughter | — | 39 | ~1901 |
| Marguerite Gross | Other | — | 7 | ~1933 |
| Richard Gross | Other | — | ~1940 | |
| Mary Gross | Daughter | — | 74 | ~1866 |
Census Appearances
1920
Calvert, Maryland
Spouse, age 55
Calvert, Maryland · implied b. ~1865 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gross |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | No |
| Can Write | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Calvert, Maryland
Other, age 61
Calvert, Maryland · implied b. ~1869 — 44 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gross |
| Given Name | Mary |
| Sex | F |
| Color / Race | Black |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Calvert-County, Maryland
Daughter, age 74
Calvert-County, Maryland · implied b. ~1866 — 12 household members
| Surname | Gross |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 74 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| 1935 Residence (City) | Solomons Island |
| 1935 Residence (County) | Calvert |
| Class of Worker | 0 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| 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 Mary Gross across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Marguerite Wilson (~0.50 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.5
Mother
Marguerite Wilson
b. ~1885
Source mother
● Household
· direct · ~0.5
This person
Anchor record
Mary Gross
Daughter · 1940 · age 74 · b. ~1866 · Maryland
★ You are viewing this record
Sibling
Emma Gross
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Blanche Wilson
Sibling · 1940 · age 35
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Parker
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lola Gross
Sibling · 1940 · age 39
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-t0627-01543-00064)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Daniel Bowen | 5 | Head | — | Maryland |
| 2 | Marguerite Wilson | 55 | Head | — | Maryland |
| 3 | Blanche Wilson | 35 | Daughter | Teacher | Maryland |
| 4 | Harriet Cecelia Wilson | 81 | Mother | — | Maryland |
| 5 | Mary E. Gross THIS PERSON | 74 | Daughter | — | Maryland |
| 6 | Lola Gross | 39 | Daughter | — | Maryland |
| 7 | Emma L. Gross | 24 | Daughter | Farmer | Maryland |
| 8 | Celestine Gross | 8 | Gr. daughter | — | Maryland |
| 9 | Jean Gross | 5 | Gr. daughter | — | Maryland |
| 10 | Marguerite Gross | 7 | Gr. daughter | — | Maryland |
| 11 | Catherine Gross | 3 | Gr. daughter | — | Maryland |
| 12 | Richard Jr. Gross | 0 | Gr. son | — | Maryland |
| 13 | Richard Jr. Parker | 24 | Son | Laborer | Maryland |
| 14 | John Dixon | 59 | Head | Laborer | Maryland |
| 15 | Carrie Dixon | 66 | Wife | — | Maryland |
| 16 | Leroy Murray | 15 | Gr. son | — | Maryland |
| 17 | Daniel Bowen | 67 | Head | — | Maryland |
| 18 | Annie L. Bowen | 58 | Wife | Farmer | Maryland |
| 19 | Lewis Bowen | 35 | Son | — | Maryland |
| 20 | Edward Bowen | 25 | Son | Laborer | Maryland |
| 21 | William Bowen | 23 | Son | Oyster Shucker | Maryland |
| 22 | Frank Bowen | 20 | Son | Oyster Shucker | Maryland |
| 23 | Joe Bowen | 18 | Son | Laborer | Maryland |
| 24 | James Bowen | 11 | Gr. son | — | Maryland |
| 25 | Dolores Bowen | 9 | Gr. daughter | — | Maryland |
| 26 | Lawrence Jackson | 27 | Head | — | Maryland |
| 27 | Annie Jackson | 25 | Wife | Oyster Shucker | Maryland |
| 28 | John Jackson | 65 | Lodger | Cook | Maryland |
| 29 | Thomas Gantt | 49 | Head | Oyster Shucker | Maryland |
| 30 | Thomas Grey | 47 | Head | — | Maryland |
| 31 | Mary Grey | 46 | Wife | Farmer | Maryland |
| 32 | Mary Grey | 15 | Daughter | — | Maryland |
| 33 | Sarah Grey | 14 | Daughter | — | Maryland |
| 34 | Thomas Grey | 12 | Son | — | Maryland |
| 35 | Harry Grey | 7 | Son | — | Maryland |
| 36 | Ernest Denton | 65 | Head | — | Maryland |
| 37 | Edna Denton | 63 | Wife | Clerk | Maryland |
| 38 | Carlyle Denton | 25 | Son | — | Maryland |
| 39 | Owen Denton | 33 | Head | Farmer | Maryland |
| 40 | Denton | 33 | Wife | Laborer | Maryland |
Related Census Records
Pedigree Summary
Mary + 4 siblings
Gen 1 · 1 parents
~0.5
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)