MJ
Mamie Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kent-County, Maryland
Our Model Tree links this Mamie Johnson across the 1930 and 1940 US Censuses in Kent-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 | Kent-County, Maryland |
| Surname | Johnson |
| Given Name | Mamie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Election Dist. 1 Kennedyville |
| 1935 Residence (County) | Kent |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Election Dist 1 Kennedyville |
| 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 Mamie | Age | Birth yr |
|---|---|---|---|---|
| Sadie Johnson | Daughter | — | 11 | ~1929 |
| Melinda Johnson | Daughter | — | 21 | ~1919 |
| Marie Johnson | Daughter | — | 15 | ~1925 |
| Mamie Johnson | Daughter | — | 13 | ~1927 |
| Nora Johnson | Daughter | — | 4 | ~1936 |
| Mack Johnson | Head | — | 44 | ~1896 |
| Samuel Johnson | Son | — | 23 | ~1917 |
| Sylvester Johnson | Son | — | 9 | ~1931 |
| Garnet Johnson | Son | — | 2 | ~1938 |
| William Johnson | Son | — | ~1940 | |
| Webster Johnson | Son | — | 16 | ~1924 |
| Sadie Johnson | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Kent, Maryland
Daughter, age 2
Kent, Maryland · implied b. ~1928 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Mamie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Kent-County, Maryland
Daughter, age 13
Kent-County, Maryland · implied b. ~1927 — 12 household members
| Surname | Johnson |
| Given Name | Mamie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Election Dist. 1 Kennedyville |
| 1935 Residence (County) | Kent |
| Highest Grade | No 6 |
| 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 Mamie Johnson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mamie Johnson
Daughter · 1940 · age 13 · b. ~1927 · Maryland
★ You are viewing this record
Sibling
Webster Johnson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Samuel Johnson
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nora Johnson
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Melinda Johnson
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sadie Johnson
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Johnson
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Garnet Johnson
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sylvester Johnson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Johnson
Sibling · 1940 · age 15
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 — Kent-County, Maryland
Open full size
1940 US Federal Census — Kent-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01552-00591)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Ziller | 28 | Head | — | Maryland |
| 2 | Agnes Ziller | 8 | Daughter | — | Maryland |
| 3 | Leon Trunster | 5 | Grandson | — | Maryland |
| 4 | Edward Boyer | 1 | Grandson | — | Maryland |
| 5 | Mack Johnson | 44 | Head | Labour | Maryland |
| 6 | Sadie Johnson | 40 | Wife | — | Maryland |
| 7 | Samuel Johnson | 23 | Son | Labour | Maryland |
| 8 | Melinda Johnson | 21 | Daughter | Cooking And House Work | Maryland |
| 9 | Webster Johnson | 16 | Son | Labour | Maryland |
| 10 | Marie Johnson | 15 | Daughter | — | Maryland |
| 11 | Mamie Johnson THIS PERSON | 13 | Daughter | — | Maryland |
| 12 | Sadie Johnson | 11 | Daughter | — | Maryland |
| 13 | Sylvester Johnson | 9 | Son | — | Maryland |
| 14 | Nora Johnson | 4 | Daughter | — | Maryland |
| 15 | Garnet Johnson | 2 | Son | — | Maryland |
| 16 | William Johnson | 0 | Son | — | Maryland |
| 17 | Ida Chism | 52 | Head | — | Maryland |
| 18 | Virginia Huntly | 23 | Daughter | — | Maryland |
| 19 | Donald Huntly | 26 | Grandson | Labour | Maryland |
| 20 | Flossie Huntly | 6 | Granddaughter | — | Maryland |
| 21 | Zelma Huntly | 3 | Granddaughter | — | Maryland |
| 22 | Charles Brown | 61 | Head | Storekeeper | Maryland |
| 23 | John Caulk | 30 | Head | Mechanic | Maryland |
| 24 | Delia Caulk | 30 | Wife | — | Maryland |
| 25 | Georgiana Hackett | 79 | Head | — | Maryland |
| 26 | Clarence Brown | 38 | Daughter | — | Maryland |
| 27 | Joseph Brown | 45 | Son-in-law | — | South Carolina |
| 28 | Joseph Jr. Brown | 18 | Grandson | — | Pennsylvania |
| 29 | Ellis Hynam | 50 | Head | Labour | Maryland |
| 30 | Anna Hynam | 49 | Wife | — | Maryland |
| 31 | Amos Evans | 53 | Head | Labour | Maryland |
| 32 | John Wilmer | 60 | Head | Labour | Maryland |
| 33 | Catherine Wilmer | 52 | Wife | — | Maryland |
| 34 | Wilmer Wilmer | 35 | Son | Labour | Maryland |
| 35 | Nora Wilmer | 27 | Daughter | — | Maryland |
| 36 | Charles Wilmer | 11 | Grandson | — | Maryland |
| 37 | Maxine Wilmer | 9 | Granddaughter | — | Maryland |
| 38 | John Wilmer | 8 | Grandson | — | Maryland |
| 39 | Joan Wilmer | 6 | Granddaughter | — | Maryland |
| 40 | Russell Wilmer | 4 | Grandson | — | 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)