MH
Mary Hancock — 1940 US Census Record
Linked across censuses1940 United States Federal Census · District-Of-Columbia-County, District of Columbia
Our Model Tree links this Mary Hancock across the 1930 and 1940 US Censuses in District-Of-Columbia-County, District of Columbia (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 9-person household.
Age 19
b. ~1921
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | District-Of-Columbia-County, District of Columbia |
| Surname | Hancock |
| Given Name | Mary M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | District of Columbia |
| 1935 Residence (County) | District Of Columbia |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | District Of Columbia |
| Est. Birth Year | ~1921 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Lillian Hancock | Spouse | — | 38 | ~1902 |
| Frances Hancock | Daughter | — | 17 | ~1923 |
| Barbara Hancock | Daughter | — | 1 | ~1939 |
| Reginald Hancock | Head | — | 46 | ~1894 |
| Reginald Hancock | Son | — | 12 | ~1928 |
| Mary Hancock | Daughter | — | 19 | ~1921 |
| Albert Hamann | Other | — | 32 | ~1908 |
| Marie Hancock | Daughter | — | 11 | ~1929 |
| Anna Hancock | Daughter | — | 15 | ~1925 |
Census Appearances
1930
None, District …
Daughter, age 8
None, District of Columbia · implied b. ~1922 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hancock |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
District-Of-Columbia-County, District …
Daughter, age 19
District-Of-Columbia-County, District of Columbia · implied b. ~1921 — 9 household members
| Surname | Hancock |
| Given Name | Mary M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | District of Columbia |
| 1935 Residence (County) | District Of Columbia |
| Hours Worked | 0 |
| Highest Grade | H 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 Hancock across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hancock
Daughter · 1940 · age 19 · b. ~1921 · District of Columbia
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Sibling
Reginald Hancock
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Hancock
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Hancock
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Hancock
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Hancock
Sibling · 1940 · age 17
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 — District-Of-Columbia-County, District of Columbia
Open full size
1940 US Federal Census — District-Of-Columbia-County, District of Columbia
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00564-00265)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Eleanor I Heart | 20 | Wife | — | Pennsylvania |
| 42 | Gerald W Heart | 1 | Son | — | Wash D.C. |
| 43 | George Wilhelm | 77 | Head | — | Pennsylvania |
| 44 | Mary J Wilhelm | 67 | Wife | — | Pennsylvania |
| 45 | John F Wiley | 50 | Head | Machinist | Maryland |
| 46 | Mazie Wiley | 40 | Wife | — | Maryland |
| 47 | Brooks S Montgomery | 34 | Head | Salesman | North Carolina |
| 48 | Myrtle Montgomery | 28 | Wife | Seamstress | North Carolina |
| 49 | Lyada M Montgomery | 3 | Daughter | — | Wash D.C. |
| 50 | Reginald C Hancock | 46 | Head | Driver | Maryland |
| 51 | Lillian M Hancock | 38 | Wife | — | Maryland |
| 52 | Mary M Hancock THIS PERSON | 19 | Daughter | — | Maryland |
| 53 | Frances V Hancock | 17 | Daughter | — | Wash D.C. |
| 54 | Anna M Hancock | 15 | Daughter | — | Wash D.C. |
| 55 | Reginald C Jr Hancock | 12 | Son | — | Wash D.C. |
| 56 | Marie I Hancock | 11 | Daughter | — | Wash D.C. |
| 57 | Barbara J Hancock | 1 | Daughter | — | Wash D.C. |
| 58 | Albert J Hamann | 32 | Lodger | Labor | Maryland |
| 59 | John J Dailey | 32 | Head | Plumber | Wash D.C. |
| 60 | Grace E Dailey | 33 | Wife | Asst Manager | Maryland |
| 61 | Charles E Gipe | 44 | Head | Machinist | Pennsylvania |
| 62 | Nina M Gipe | 58 | Wife | — | Maryland |
| 63 | Hubert Johnson | 30 | Head | Night Manager | North Carolina |
| 64 | Thelma M Johnson | 25 | Wife | Waitress | North Carolina |
| 65 | Robert E Reaves | 27 | Lodger | Cook Manager | North Carolina |
| 66 | Alice Reaves | 27 | Wife | — | North Carolina |
| 67 | Sharon Reaves | 2 | Daughter | — | North Carolina |
| 68 | Henry Warrener | 62 | Head | — | New York |
| 69 | Bessie Warrener | 57 | Wife | — | New York |
| 70 | Clement Warrener | 29 | Son | Labor | New York |
| 71 | Raymond Warrener | 27 | Son | Asst Manager | Texas |
| 72 | Joseph A Warrener | 18 | Son | — | Kansas |
| 73 | Charles W Appleton | 20 | Lodger | Asst Manager | Maryland |
| 74 | George Jones | 35 | Head | Labor | North Carolina |
| 75 | Mary Jones | 27 | Wife | General House Work | North Carolina |
| 76 | Amanda Walters | 47 | Lodger | — | Virginia |
| 77 | Ralph E Walters | 25 | Son | Labor | Wash D.C. |
| 78 | Raymond A Walters | 23 | Son | Delivery Boy | Wash D.C. |
| 79 | Mildred L Walters | 20 | Daughter | General House Work | Wash D.C. |
| 80 | Dorothy E Walters | 18 | Daughter | General House Work | 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)