MJ
Mable Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Maryland
Our Model Tree links this Mable Johnson across the 1930 and 1940 US Censuses in Montgomery-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 8-person household.
Age 12
b. ~1928
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Maryland |
| Surname | Johnson |
| Given Name | Mable M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | C |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Mt Zion Election Dist 8 |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same Place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Mt Zion Election Dist 8 |
| Est. Birth Year | ~1928 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mable | Age | Birth yr |
|---|---|---|---|---|
| Robert Johnson | Head | — | 48 | ~1892 |
| Allieda Johnson | Spouse | — | 42 | ~1898 |
| Bertha Johnson | Daughter | — | 16 | ~1924 |
| Robert Johnson | Son | — | 24 | ~1916 |
| Sarah Johnson | Daughter | — | 18 | ~1922 |
| Elsie Johnson | Daughter | — | 15 | ~1925 |
| Fred Johnson | Son | — | 22 | ~1918 |
| Mable Johnson | Daughter | — | 12 | ~1928 |
Census Appearances
1930
Montgomery, Maryland
Daughter, age 3
Montgomery, Maryland · implied b. ~1927 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Mabel L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| 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
Montgomery-County, Maryland
Daughter, age 12
Montgomery-County, Maryland · implied b. ~1928 — 8 household members
| Surname | Johnson |
| Given Name | Mable M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | C |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Mt Zion Election Dist 8 |
| 1935 Residence (County) | Montgomery |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 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 Mable Johnson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mable Johnson
Daughter · 1940 · age 12 · b. ~1928 · Maryland
★ You are viewing this record
Sibling
Fred Johnson
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Johnson
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bertha Johnson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sarah Johnson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elsie 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 — Montgomery-County, Maryland
Open full size
1940 US Federal Census — Montgomery-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01554-00761)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Martha Lee | 22 | Wife | — | Virginia |
| 42 | Jimmy Lee | 2 | Son | — | Virginia |
| 43 | John R. Porter | 67 | Head | Farmer | Tennessee |
| 44 | Thomas Porter | 34 | Son | Mechanic | Arkansas |
| 45 | Elizabeth Porter | 27 | Daughter | — | Virginia |
| 46 | Thomas N. Porter | 9 | Grandson | — | Dist. of Col. |
| 47 | Jerome Porter | 7 | Grandson | — | Maryland |
| 48 | Runney Rucker | 3 | Grandson | — | Maryland |
| 49 | Betty Jones | 1 | Granddaughter | — | Maryland |
| 50 | Rodney Martin | 33 | Head | Farm Hand | Virginia |
| 51 | Millie Martin | 30 | Wife | — | Virginia |
| 52 | Lucille Martin | 11 | Daughter | — | Virginia |
| 53 | Lois Martin | 8 | Daughter | — | Virginia |
| 54 | Zabuta Martin | 7 | Daughter | — | Virginia |
| 55 | Kenneth Martin | 4 | Son | — | Virginia |
| 56 | Paul Martin | 3 | Son | — | Virginia |
| 57 | Robert Johnson | 48 | Head | Farm Hand | Maryland |
| 58 | Allieda Johnson | 42 | Wife | Maid | Maryland |
| 59 | Robert Jr. Johnson | 24 | Son | House Boy | Maryland |
| 60 | Fred D. Johnson | 22 | Son | Farm Hand | Maryland |
| 61 | Sarah Johnson | 18 | Daughter | House Girl | Maryland |
| 62 | Bertha Johnson | 16 | Daughter | House Girl | Maryland |
| 63 | Elsie Johnson | 15 | Daughter | — | Maryland |
| 64 | Mable M. Johnson THIS PERSON | 12 | Daughter | — | Maryland |
| 65 | Robert M. Howard | 54 | Head | Farmer | Maryland |
| 66 | Eva Howard | 74 | Sister | — | Maryland |
| 67 | Artemas Howard | 65 | Brother | Farmer | Maryland |
| 68 | Thomas Howard | 60 | Brother | Farmer | Maryland |
| 69 | Margaret Howard | 58 | Sister | — | Maryland |
| 70 | Robert Dodson | 32 | Head | Janitor | Maryland |
| 71 | Raymond Hungford | 30 | Head | Farm Hand | Maryland |
| 72 | Annetta Hungford | 24 | Wife | — | Maryland |
| 73 | Francis Hungford | 7 | Son | — | Maryland |
| 74 | Mary Hungford | 3 | Daughter | — | Maryland |
| 75 | Loriene Hungford | 1 | Daughter | — | Maryland |
| 76 | Ridgely Hanscom | 52 | Head | Physician | Dist. of Col. |
| 77 | Mable Hanscom | 52 | Wife | — | Massachusetts |
| 78 | Frank Offutt | 58 | Head | Farm Hand | Maryland |
| 79 | John Keyser | 50 | Head | Farmer | Maryland |
| 80 | Nettie Keyser | 49 | Wife | — | 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)