DJ
Dorothy Johnson — 1930 US Census Record
Model Tree available1930 United States Federal Census · Montgomery, Maryland
Our Model Tree links this Dorothy Johnson across the 1910, 1920 and 1930 US Censuses in Montgomery, Maryland (XGBoost, ~Confirmed), with identified parents William & Wm — first a daughter (b.~1908), then head of a 9-person household.
Age 22
b. ~1908
Female
Daughter
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Montgomery, Maryland |
| Surname | Johnson |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Occupation | Operator |
| Industry | Telephone |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Operator |
| Township / Ward | Election District 5 Columbia Part Of Cooksville District 5 Pt 2 |
| Est. Birth Year | ~1908 |
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 1930 census.
| Name | Relation to head | Relative to Dorothy | Age | Birth yr |
|---|---|---|---|---|
| Eleanor Johnson | Daughter | — | 13 | ~1917 |
| Gladys Johnson | Daughter | — | 13 | ~1917 |
| Dorothy Johnson | Daughter | — | 22 | ~1908 |
| Marie Johnson | Daughter | — | 15 | ~1915 |
| William Johnson | Head | — | 56 | ~1874 |
| James Johnson | Other | — | 21 | ~1909 |
| Sarah Johnson | Other | — | 77 | ~1853 |
| Robert Johnson | Son | — | 9 | ~1921 |
| Margaret Johnson | Spouse | — | 46 | ~1884 |
Census Appearances
1910
Montgomery, Maryland
Other, age 1
Montgomery, Maryland · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Dora R |
| Relationship to Head | Niece |
| Sex | F |
| Color / Race | Black |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1920
Montgomery, Maryland
Daughter, age 11
Montgomery, Maryland · implied b. ~1909 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Montgomery, Maryland
Daughter, age 22
Montgomery, Maryland · implied b. ~1908 — 9 household members
| Surname | Johnson |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Operator |
| Industry | Telephone |
| Class of Worker | W |
| Can Read/Write | Yes |
| 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 Dorothy Johnson across 3 US Census years (1910, 1920 and 1930) in Montgomery, Maryland, using XGBoost record linkage. Identified parents: father William Johnson (~0.92 confidence) and father Wm Johnson (~0.92 confidence) and mother Margaret Johnson (~0.92 confidence) and mother Margaret Johnson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Johnson
b. ~1874
Source father
● Household
· direct · ~0.92
Father
Wm Johnson
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Margaret Johnson
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Margaret Johnson
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Dorothy Johnson
Daughter · 1930 · age 22 · b. ~1908 · Maryland
★ You are viewing this record
Sibling
Eleanor Johnson
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Johnson
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Johnson
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gladys Johnson
Sibling · 1930 · age 13
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
1930 US Federal Census — Montgomery, Maryland
Open full size
1930 US Federal Census — Montgomery, Maryland
Page Contents
50 people indexed on this census page (ia:1930:15thcensus876unit:0875)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Davenport | 21 | Son | Chauffeur | Maryland |
| 2 | Robert Davenport | 20 | Son | Laborer | Maryland |
| 3 | Minnie Davenport | 18 | Daughter | Laborer | Maryland |
| 4 | Dora Davenport | 13 | Daughter | None | Maryland |
| 5 | Rosa Davenport | 10 | Daughter | None | Maryland |
| 6 | Jeffrey Davenport | 8 | Son | None | Maryland |
| 7 | Edith Davenport | 5 | Daughter | None | Maryland |
| 8 | James Milson | 47 | Head | Labour | Maryland |
| 9 | Alice H Milson | 41 | Wife | None | Maryland |
| 10 | Roland Milson | 17 | Son | Laborer | Maryland |
| 11 | Clarence Milson | 16 | Son | Laborer | Maryland |
| 12 | James Milson | 14 | Son | None | Maryland |
| 13 | Sarah Milson | 14 | Daughter | None | Maryland |
| 14 | Lewis Milson | 12 | Son | None | Maryland |
| 15 | Robert Milson | 10 | Son | None | Maryland |
| 16 | Alice Milson | 7 | Daughter | None | Maryland |
| 17 | Herman Milson | 6 | Son | None | Maryland |
| 18 | Mary Milson | 4 | Daughter | None | Maryland |
| 19 | Grace Milson | 3 | Daughter | None | Maryland |
| 20 | Edward P Margarewa | 69 | Head | None | Pennsylvania |
| 21 | Mary V Margarewa | 66 | Wife | None | Maryland |
| 22 | Charles Brown | 12 | Grandson | None | Maryland |
| 23 | Robert Harker | 44 | Head | Farmer | Maryland |
| 24 | Elmer Harker | 40 | Wife | None | Maryland |
| 25 | Herman Harker | 17 | Son | None | Maryland |
| 26 | Hallie Harker | 14 | Daughter | None | Maryland |
| 27 | Charles Harker | 6 | Son | None | Maryland |
| 28 | Mary L Harker | 2 | Daughter | None | Maryland |
| 29 | James H Harding | 61 | Head | Farmer | Maryland |
| 30 | Dalton Harding | 24 | Son | None | Maryland |
| 31 | Belle Carlisle | 48 | Servant | Housekeeper | Maryland |
| 32 | Clifton Carlisle | 16 | Grandson | None | Maryland |
| 33 | Andrew Carlisle | 14 | Boarder | None | Maryland |
| 34 | William H Johnson | 56 | Head | Farmer | Maryland |
| 35 | Margaret Johnson | 46 | Wife | None | Maryland |
| 36 | Dorothy Johnson THIS PERSON | 22 | Daughter | Operator | Maryland |
| 37 | Eleanor Johnson | 13 | Daughter | None | Maryland |
| 38 | Gladys Johnson | 13 | Daughter | None | Maryland |
| 39 | Robert F Johnson | 9 | Son | None | Maryland |
| 40 | Marie Johnson | 15 | Daughter | None | Maryland |
| 41 | James E Johnson | 21 | Nephew | Helper | Maryland |
| 42 | Sarah E Johnson | 77 | Step-Mother | None | Maryland |
| 43 | John E Johnson | 52 | Head | Laborer | Virginia |
| 44 | Jeannette E Johnson | 50 | Wife | None | Virginia |
| 45 | Donald Johnson | 8 | Son | None | Maryland |
| 46 | Lewis B Jackson | 37 | Head | Fireman | Virginia |
| 47 | Laura Jackson | 33 | Wife | None | Maryland |
| 48 | Lewis Jr Jackson | 1 | Son | None | Maryland |
| 49 | Albert Johnson | 13 | Grandson | Laborer | Maryland |
| 50 | Robert Davenport | 42 | Head | Merchant | Maryland |
Pedigree Summary
Dorothy + 4 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)