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Margaret Gray — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Calvert-County, Maryland
Our Model Tree links this Margaret Gray across the 1930 and 1940 US Censuses in Calvert-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1919), then head of a 10-person household.
Age 21
b. ~1919
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Calvert-County, Maryland |
| Surname | Gray |
| Given Name | Margaret J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Calvert |
| Additional Details | |
| Highest Grade | No 10 |
| 1935 Residence | Md |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Third Elec Dist |
| 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Mabel Smith | Daughter | — | 14 | ~1926 |
| Annie Smith | Spouse | — | 41 | ~1899 |
| William Smith | Son | — | 19 | ~1921 |
| Margaret Gray | Daughter | — | 21 | ~1919 |
| Janice Smith | Daughter | — | 12 | ~1928 |
| Katherine Smith | Daughter | — | 24 | ~1916 |
| Thomas Smith | Son | — | 7 | ~1933 |
| Ernest Gray | Other | — | 5 | ~1935 |
| Evelyn Gray | Other | — | 3 | ~1937 |
| Ernest Smith | Head | — | 48 | ~1892 |
Census Appearances
1930
Charles, Maryland
Daughter, age 11
Charles, Maryland · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gray |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Calvert-County, Maryland
Daughter, age 21
Calvert-County, Maryland · implied b. ~1919 — 10 household members
| Surname | Gray |
| Given Name | Margaret J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Calvert |
| Highest Grade | No 10 |
| 1935 Residence | Md |
| 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 Margaret Gray across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Margaret Gray
Daughter · 1940 · age 21 · b. ~1919 · Maryland
★ You are viewing this record
Sibling
Janice Smith
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katherine Smith
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Smith
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Smith
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mabel Smith
Sibling · 1940 · age 14
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-t0627-01543-00217)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert X Horseman | 38 | Head | Laborer | Maryland |
| 42 | Mary Horseman | 39 | Wife | Servant | Maryland |
| 43 | Helen Mason | 8 | Nephew | — | Maryland |
| 44 | James Mason | 5 | Nephew | — | Maryland |
| 45 | Julius X Coates | 53 | Head | Farmer | Maryland |
| 46 | Alice Coates | 51 | Wife | — | Maryland |
| 47 | Janice Rice | 16 | Daughter | — | Maryland |
| 48 | Geneva Jacke | 12 | Niece | — | Maryland |
| 49 | Lydia X Lesser | 51 | Head | — | Maryland |
| 50 | Roland E Lesser | 24 | Son | Farmer | Maryland |
| 51 | Marie E Lesser | 26 | Daughter | — | Maryland |
| 52 | Alexander R Lesser | 6 | Grandson | — | Maryland |
| 53 | Lydia M Lesser | 5 | Granddaughter | — | Maryland |
| 54 | Doris A Lesser | 4 | Granddaughter | — | Maryland |
| 55 | Russell E Lesser | 2 | Grandson | — | Maryland |
| 56 | William R Lesser | 0 | Grandson | — | Maryland |
| 57 | Emory Forrester | 60 | Servant | Laborer | Maryland |
| 58 | Adam Hightower | 38 | Head | Chauffeur | Wash D.C. |
| 59 | Mabel X Hightower | 22 | Wife | — | Maryland |
| 60 | Frederick Hightower | 6 | Son | — | Maryland |
| 61 | Douglas Hightower | 4 | Son | — | Maryland |
| 62 | Maurice Stallings | 48 | Head | Farmer | Maryland |
| 63 | Mollie X Stallings | 47 | Wife | — | Maryland |
| 64 | James F Stallings | 17 | Son | Helper | Maryland |
| 65 | Ernest X Smith | 48 | Head | Farmer | Maryland |
| 66 | Annie Smith | 41 | Wife | — | Maryland |
| 67 | Katherine Smith | 24 | Daughter | Maid | Maryland |
| 68 | William F Smith | 19 | Son | General Helper | Maryland |
| 69 | Mabel Smith | 14 | Daughter | — | Maryland |
| 70 | Janice Smith | 12 | Daughter | — | Maryland |
| 71 | Thomas E Smith | 7 | Son | — | Maryland |
| 72 | Margaret J Gray THIS PERSON | 21 | Daughter | — | Maryland |
| 73 | Ernest Gray | 5 | Grandson | — | Maryland |
| 74 | Evelyn Gray | 3 | Granddaughter | — | Maryland |
| 75 | Arthur X Jones | 28 | Head | Farmer | Maryland |
| 76 | Mary Jones | 26 | Wife | Laundress | Maryland |
| 77 | Virginia Jones | 11 | Daughter | — | Maryland |
| 78 | Leila Jones | 9 | Daughter | — | Maryland |
| 79 | James Jones | 7 | Son | — | Maryland |
| 80 | Sadie Jones | 6 | 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)