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Ruth Gray — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Calvert-County, Maryland
Our Model Tree links this Ruth Gray across the 1930 and 1940 US Censuses in Calvert-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 12-person household.
Age 13
b. ~1927
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Calvert-County, Maryland |
| Surname | Gray |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Third Election District |
| 1935 Residence (County) | Calvert |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same house |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Third Election District |
| Est. Birth Year | ~1927 |
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 Ruth | Age | Birth yr |
|---|---|---|---|---|
| Louis Gray | Son | — | 2 | ~1938 |
| Ruth Gray | Daughter | — | 13 | ~1927 |
| Joseph Gray | Head | — | 41 | ~1899 |
| Hazel Gray | Daughter | — | ~1940 | |
| Julius Gray | Son | — | 14 | ~1926 |
| Robert Gray | Son | — | 12 | ~1928 |
| Ellen Gray | Spouse | — | 34 | ~1906 |
| Eddie Gray | Son | — | 2 | ~1938 |
| Mabel Gray | Daughter | — | 5 | ~1935 |
| John Gray | Son | — | 8 | ~1932 |
| Cornelius Gray | Son | — | 9 | ~1931 |
| Charles Gray | Son | — | 3 | ~1937 |
Census Appearances
1930
Calvert, Maryland
Daughter, age 3
Calvert, Maryland · implied b. ~1927 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gray |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Calvert-County, Maryland
Daughter, age 13
Calvert-County, Maryland · implied b. ~1927 — 12 household members
| Surname | Gray |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Third Election District |
| 1935 Residence (County) | Calvert |
| Highest Grade | No 5 |
| 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 Ruth Gray across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Ruth Gray
Daughter · 1940 · age 13 · b. ~1927 · Maryland
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Sibling
Cornelius Gray
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mabel Gray
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Gray
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louis Gray
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Gray
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Gray
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julius Gray
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eddie Gray
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hazel Gray
Sibling · 1940 · age
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-t0627-01543-00222)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles Birckhead | 72 | Head | — | Maryland |
| 2 | Mamie E Birckhead | 66 | Wife | — | Maryland |
| 3 | Pat Coates | 34 | Head | Farmer | Maryland |
| 4 | Octavia Coates | 49 | Wife | — | Maryland |
| 5 | Mary F Huckins | 13 | Foster Child | — | Maryland |
| 6 | Ernest Gredley | 20 | Head | Laborer | Maryland |
| 7 | Joseph Gray | 41 | Head | General Helper | Maryland |
| 8 | Ellen Gray | 34 | Wife | — | Maryland |
| 9 | Julius Gray | 14 | Son | — | Maryland |
| 10 | Ruth Gray THIS PERSON | 13 | Daughter | — | Maryland |
| 11 | Robert Gray | 12 | Son | — | Maryland |
| 12 | Cornelius Gray | 9 | Son | — | Maryland |
| 13 | John H Gray | 8 | Son | — | Maryland |
| 14 | Mabel Gray | 5 | Daughter | — | Maryland |
| 15 | Charles Gray | 3 | Son | — | Maryland |
| 16 | Eddie Gray | 2 | Son | — | Maryland |
| 17 | Louis Gray | 2 | Son | — | Maryland |
| 18 | Hazel Gray | 0 | Daughter | — | Maryland |
| 19 | James H Coates | 44 | Head | Laborer | Maryland |
| 20 | Luvenia Coates | 48 | Wife | Cook | Maryland |
| 21 | Archie P Norfolk | 51 | Head | Farmer | Maryland |
| 22 | Edna V Norfolk | 42 | Wife | — | Maryland |
| 23 | Algere A Norfolk | 26 | Son | Farmer | Maryland |
| 24 | John W Norfolk | 23 | Son | Farm Helper | Maryland |
| 25 | Annie L Norfolk | 19 | Daughter | — | Maryland |
| 26 | Edna V Norfolk | 7 | Daughter | — | Maryland |
| 27 | Samuel Owings | 43 | Head | Farmer | Maryland |
| 28 | Margaret H Owings | 33 | Wife | — | Maryland |
| 29 | James Hills | 54 | Head | Farmer | Maryland |
| 30 | Priscilla Hills | 52 | Wife | — | Maryland |
| 31 | James Hills | 24 | Son | Laborer | Maryland |
| 32 | Sureluis Hills | 21 | Son | Laborer | Maryland |
| 33 | Leander Hills | 20 | Son | — | Maryland |
| 34 | Hazel Hills | 16 | Daughter | — | Maryland |
| 35 | Elizabeth Hills | 18 | Daughter | — | Maryland |
| 36 | Charles Hills | 2 | Grand-Child | — | Maryland |
| 37 | Sureluis Jr Hills | 1 | Grand-Child | — | Maryland |
| 38 | Calvin Hills | 13 | Grand-Son | — | Maryland |
| 39 | Preston Creek | 26 | Son-in-law | Laborer | Maryland |
| 40 | James Creek | 0 | Grand-Son | — | Maryland |
Related Census Records
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)