MJ
Mary Jefferson — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Calvert, Maryland
Our Model Tree links this Mary Jefferson across the 1920, 1930 and 1940 US Censuses in Calvert, Maryland (XGBoost, ~Confirmed) — first a spouse (b.~1878), then head of a 3-person household.
Age 42
b. ~1878
Female
Spouse
Born: Maryland
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Calvert, Maryland |
| Surname | Jefferson |
| Given Name | Mary H |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Solomons Dist 1 Pre 1 Part Of |
| Est. Birth Year | ~1878 |
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.
3 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Goldie Jefferson | Son | — | 25 | ~1895 |
| Mary Jefferson | Spouse | — | 42 | ~1878 |
| Rich Jefferson | Head | — | 45 | ~1875 |
Census Appearances
1920
Calvert, Maryland
Spouse, age 42
Calvert, Maryland · implied b. ~1878 — 3 household members
| Surname | Jefferson |
| Given Name | Mary H |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Calvert, Maryland
Spouse, age 50
Calvert, Maryland · implied b. ~1880 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jefferson |
| Given Name | Martha E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 18 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Calvert-County, Maryland
Spouse, age 65
Calvert-County, Maryland · implied b. ~1875 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jefferson |
| Given Name | Martha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | First Election District |
| 1935 Residence (County) | Calvert |
| Hours Worked | 0 |
| Highest Grade | No 4 |
| 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 Jefferson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Jefferson
Spouse · 1920 · age 42 · b. ~1878 · Maryland
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Calvert, Maryland
Open full size
1920 US Federal Census — Calvert, Maryland
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu654unit:0342)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Delphine | 22 | Grand Daugh | — | Maryland |
| 52 | Alfred Bishop | 33 | Brother | — | Maryland |
| 53 | Samuel H Bishop | 70 | Head | — | Maryland |
| 54 | Sarah Bishop | 57 | Wife | — | Maryland |
| 55 | John Bishop | 24 | Son | Oysterman | Maryland |
| 56 | Samuel Bishop | 25 | Son | Laborer | Maryland |
| 57 | Benj Bishop | 17 | Son | Oysterman | Maryland |
| 58 | Joseph Garner | 24 | Head | Oysterman | Maryland |
| 59 | Edith Garner | 24 | Wife | — | Maryland |
| 60 | William Garner | 7 | Son | — | Maryland |
| 61 | Rufus Garner | 2 | Son | — | Maryland |
| 62 | Edward Garner | 0 | Son | — | Maryland |
| 63 | Thomas E Gantt | 57 | Head | Farmer | Maryland |
| 64 | N D Rollins | 44 | Head | Farmer | Maryland |
| 65 | Virginia W Rollins | 43 | Wife | Teacher | Maryland |
| 66 | Virginia D Rollins | 8 | Daughter | — | Maryland |
| 67 | N D Jr Rollins | 6 | Son | — | Maryland |
| 68 | M H Dare | 49 | Cousin | — | Maryland |
| 69 | Mary S Dare | 83 | Mother | — | Maryland |
| 70 | Rich Jefferson | 45 | Head | Laborer | Maryland |
| 71 | Mary H Jefferson THIS PERSON | 42 | Wife | — | Maryland |
| 72 | Goldie Jefferson | 25 | Son | Laborer | Maryland |
| 73 | William Savage | 23 | Head | Laborer | Maryland |
| 74 | Margaretta Savage | 24 | Wife | — | Maryland |
| 75 | Wesley Gross | 30 | Head | Farm | Maryland |
| 76 | Rosa Gross | 30 | Wife | — | Maryland |
| 77 | Harry Gross | 15 | Son | Laborer | Maryland |
| 78 | William H Gross | 14 | Son | Laborer | Maryland |
| 79 | Warren Gantt | 40 | Head | Farmer | Maryland |
| 80 | Lettie E Blunt | 36 | Head | — | Maryland |
| 81 | Margret E Blunt | 12 | Daughter | — | Maryland |
| 82 | Natalie R Blunt | 8 | Daughter | — | Maryland |
| 83 | John N Blunt | 0 | Son | — | Maryland |
| 84 | Lil Duke | 35 | Servant | Private Family | Maryland |
| 85 | Luther Duke | 9 | Servant | — | Maryland |
| 86 | Ollie Johnson | 34 | Head | Laborer | Maryland |
| 87 | Maggie Johnson | 30 | Wife | Washwoman | Maryland |
| 88 | Violetta Johnson | 10 | Daughter | — | Maryland |
| 89 | Estella Johnson | 8 | Daughter | — | Maryland |
| 90 | Ollie Johnson | 5 | Son | — | Maryland |
| 91 | Paul B Gray | 31 | Head | Farmer | Maryland |
| 92 | Elsie R Gray | 25 | Wife | — | Maryland |
| 93 | Paul B Jr Gray | 7 | Son | — | Maryland |
| 94 | John Gray | 3 | Son | — | Maryland |
| 95 | William Gray | 1 | Son | — | Maryland |
| 96 | Isaac E Hutchins | 55 | Head | Teacher | Maryland |
| 97 | Annie M Hutchins | 45 | Wife | — | Maryland |
| 98 | Albert Hutchins | 25 | Son | Farmer | Maryland |
| 99 | Arthur Hutchins | 16 | Son | Laborer | Maryland |
| 100 | Walter Hutchins | 14 | Son | Laborer | Maryland |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)