MJ
Mamie Johnson — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Greenville, South Carolina
Our Model Tree links this Mamie Johnson across the 1920, 1930 and 1940 US Censuses in Greenville, South Carolina (XGBoost, ~Confirmed) — first a spouse (b.~1899), then head of a 6-person household.
Age 31
b. ~1899
Female
Spouse
Born: South Carolina
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Greenville, South Carolina |
| Surname | Johnson |
| Given Name | Mamie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 31 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 21 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Additional Details | |
| Occupation | Laundress |
| Industry | At Home |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Laundress |
| Township / Ward | Greenville City |
| Est. Birth Year | ~1899 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mamie | Age | Birth yr |
|---|---|---|---|---|
| Emmaline Johnson | Daughter | — | 13 | ~1917 |
| Ulysses Johnson | Head | — | 51 | ~1879 |
| William Johnson | Son | — | 6 | ~1924 |
| James Johnson | Son | — | 8 | ~1922 |
| Isaac Johnson | Son | — | 4 | ~1926 |
| Mamie Johnson | Spouse | — | 31 | ~1899 |
Census Appearances
1920
Greenville, South …
Spouse, age 20
Greenville, South Carolina · implied b. ~1900 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Minnie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1930
Greenville, South …
Spouse, age 31
Greenville, South Carolina · implied b. ~1899 — 6 household members
| Surname | Johnson |
| Given Name | Mamie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 31 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 21 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Laundress |
| Industry | At Home |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Greenville-County, South …
Spouse, age 42
Greenville-County, South Carolina · implied b. ~1898 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Minnie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 42 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Greenville City |
| 1935 Residence (County) | Greenville |
| Occupation | Servant |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 260 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mamie Johnson
Spouse · 1930 · age 31 · b. ~1899 · South Carolina
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Greenville, South Carolina
Open full size
1930 US Federal Census — Greenville, South Carolina
Page Contents
50 people indexed on this census page (ia:1930:15thcensus2198unit:0788)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Ulysses Johnson | 51 | Head | — | South Carolina |
| 52 | Mamie Johnson THIS PERSON | 31 | Wife | Laundress | South Carolina |
| 53 | Emmaline Johnson | 13 | Daughter | — | Georgia |
| 54 | James Johnson | 8 | Son | — | Georgia |
| 55 | William Johnson | 6 | Son | — | Georgia |
| 56 | Isaac Johnson | 4 | Son | — | Georgia |
| 57 | Amanda Gamble | 65 | Head | Laundress | South Carolina |
| 58 | Lizzie Johnson | 45 | Daughter | Cook | South Carolina |
| 59 | Daisy Williams | 41 | Daughter | Cook | South Carolina |
| 60 | West Kelley | 42 | Roomer | Carpenter | South Carolina |
| 61 | Bell Kelley | 32 | Roomer | — | Georgia |
| 62 | Dorothy Bonapart | 39 | Head | Laundress | South Carolina |
| 63 | Minnie Bonapart | 36 | Wife | Cook | South Carolina |
| 64 | George W. Griffin | 56 | Head | Printer | South Carolina |
| 65 | Agnes M. Griffin | 51 | Sister | Housekeeper | South Carolina |
| 66 | Thomas J. Griffin | 86 | Uncle | — | South Carolina |
| 67 | Lucius M. Cline | 51 | Head | — | South Carolina |
| 68 | Lula Mae Cline | 37 | Wife | — | North Carolina |
| 69 | Lucius M. Jr. Cline | 11 | Son | — | South Carolina |
| 70 | Sarah E. Cline | 2 | Daughter | — | South Carolina |
| 71 | Ralph L. Cline | 46 | Brother | — | South Carolina |
| 72 | Sarah E. Cline | 75 | Mother | — | South Carolina |
| 73 | L. Walter Steadman | 56 | Head | Blacksmith | South Carolina |
| 74 | Eunice Steadman | 46 | Wife | — | North Carolina |
| 75 | Ruth Steadman | 19 | Daughter | — | South Carolina |
| 76 | Iva Steadman | 17 | Daughter | — | South Carolina |
| 77 | Nina Steadman | 15 | Daughter | — | South Carolina |
| 78 | L. Walter Jr. Steadman | 13 | Son | — | South Carolina |
| 79 | John C. Monroe | 35 | Head | Fireman | North Carolina |
| 80 | Effie Monroe | 32 | Wife | — | South Carolina |
| 81 | Frances Monroe | 5 | Daughter | — | South Carolina |
| 82 | Th. W. Garrison | 44 | Head | — | South Carolina |
| 83 | Ada Garrison | 41 | Wife | — | North Carolina |
| 84 | Claude Garrison | 20 | Son | Mechanic | South Carolina |
| 85 | Lucile Garrison | 22 | Daughter | — | South Carolina |
| 86 | Luther Garrison | 18 | Son | Caddy Master | South Carolina |
| 87 | Jerome Garrison | 15 | Son | Caddie | South Carolina |
| 88 | Harriett Garrison | 12 | Daughter | Packer | South Carolina |
| 89 | Beatrice Garrison | 10 | Daughter | Packer | South Carolina |
| 90 | Ruth Garrison | 7 | Daughter | — | South Carolina |
| 91 | Betty Garrison | 3 | Granddaughter | — | South Carolina |
| 92 | Betty Smithfield | 36 | Sister-in-law | — | North Carolina |
| 93 | Ethel Smithfield | 15 | Niece | — | North Carolina |
| 94 | Frances Bass | 19 | Boarder | Operator | South Carolina |
| 95 | William A. Roper | 47 | Head | Fireman | South Carolina |
| 96 | Eva Roper | 51 | Wife | — | South Carolina |
| 97 | James C. Hampton | 34 | Head | Fireman | South Carolina |
| 98 | Nellie L. Hampton | 35 | Wife | — | South Carolina |
| 99 | Frances E. Hampton | 6 | Daughter | — | South Carolina |
| 100 | James C. Jr. Hampton | 3 | Son | — | South Carolina |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)