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Martha Brown — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Martha Brown across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents Augustus & Augustus — first a daughter (b.~1919), then head of a 5-person household.
Age 21
b. ~1919
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Brown |
| Given Name | Martha |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Balto. City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | secretary |
| Industry | n.y.a. |
| Class of Worker | GW |
| Income (1939) | 236 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Secretary |
| Township / Ward | Balto City |
| Est. Birth Year | ~1919 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Martha | Age | Birth yr |
|---|---|---|---|---|
| Martha Brown | Daughter | — | 21 | ~1919 |
| Augustus Brown | Head | — | 57 | ~1883 |
| Leander Brown | Son | — | 15 | ~1925 |
| Elwood Brown | Son | — | 22 | ~1918 |
| Ruth Brown | Spouse | — | 42 | ~1898 |
Census Appearances
1920
Baltimore, Maryland
Daughter, age
Baltimore, Maryland · implied b. ~1920 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Martha A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Daughter, age 10
Baltimore, Maryland · implied b. ~1920 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Virginia |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Daughter, age 21
Baltimore-City-County, Maryland · implied b. ~1919 — 5 household members
| Surname | Brown |
| Given Name | Martha |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Balto. City |
| 1935 Residence (County) | Baltimore City |
| Occupation | secretary |
| Industry | n.y.a. |
| Class of Worker | GW |
| Income (1939) | 236 |
| Highest Grade | H 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 Martha Brown across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Augustus Brown (~0.92 confidence) and father Augustus Brown (~0.92 confidence) and father Augustus Brown (~0.92 confidence) and mother Ruth Brown (~0.92 confidence) and mother Ruth Brown (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Augustus Brown
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Augustus Brown
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Augustus Brown
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Ruth Brown
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Ruth Brown
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Martha Brown
Daughter · 1940 · age 21 · b. ~1919 · Maryland
★ You are viewing this record
Sibling
Elwood Brown
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leander Brown
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 — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01540-00871)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edward Thomas | 2 | grandson | — | Maryland |
| 42 | Edward Thomas | 1 | grandson | — | Maryland |
| 43 | Walter Baskerville | 54 | head | Chauffeur | Virginia |
| 44 | Georgia Baskerville | 48 | wife | — | Virginia |
| 45 | Bernice Baskerville | 20 | daughter | Maid | Maryland |
| 46 | Louise Baskerville | 19 | daughter | — | Maryland |
| 47 | Walter Jr. Baskerville | 17 | son | Drives Truck | Maryland |
| 48 | Virginia Baskerville | 16 | daughter | — | Maryland |
| 49 | George Handy | 59 | head | Porter | Maryland |
| 50 | Lulu L. Johnson | 48 | boarder | Domestic | Maryland |
| 51 | Salma Stoes | 42 | head | Maid | Maryland |
| 52 | Charles Stoes | 39 | brother | — | Maryland |
| 53 | John Williams | 48 | head | Chauffeur | Maryland |
| 54 | Ellen Williams | 53 | wife | — | Maryland |
| 55 | Augustus G. Brown | 57 | head | Laborer | Maryland |
| 56 | Ruth Brown | 42 | wife | — | Virginia |
| 57 | Martha Brown THIS PERSON | 21 | daughter | Secretary | Maryland |
| 58 | Elwood Brown | 22 | son | — | Maryland |
| 59 | Leander Brown | 15 | son | — | Maryland |
| 60 | James Y. Ennis | 53 | head | Stewart | Maryland |
| 61 | Fanny Ennis | 55 | wife | — | Maryland |
| 62 | William Ennis | 27 | son | Delivery Truck | Maryland |
| 63 | Betty Ennis | 20 | daughter | — | Maryland |
| 64 | Cleopatra Ennis | 16 | daughter | — | Maryland |
| 65 | Frances Brown | 25 | daughter | Housekeeper | Maryland |
| 66 | Fanny Taylor | 72 | mother-in-law | — | Virginia |
| 67 | Elizabeth Taylor | 29 | daughter | — | Virginia |
| 68 | Sylvester Morris | 40 | head | Valet | Maryland |
| 69 | Ida Morris | 38 | wife | — | Maryland |
| 70 | Herbert Hughes | 7 | orphan | — | Maryland |
| 71 | James H. Parker | 34 | head | Shipping Clerk | Maryland |
| 72 | Dora Parker | 35 | wife | — | Maryland |
| 73 | Margaret Waters | 30 | lodger | — | Maryland |
| 74 | Edgar Scotts | 48 | head | Chauffeur | Maryland |
| 75 | Edgar Jr. Scotts | 18 | son | Baker | Maryland |
| 76 | Gladys Mitchell | 39 | roomer | — | Maryland |
| 77 | James Walker | 42 | head | Collector | Maryland |
| 78 | Elverta Walker | 37 | wife | Maid | Maryland |
| 79 | Rita Colbert | 42 | lodger | Domestic | Maryland |
| 80 | James A. Cornish | 55 | head | — | Maryland |
Pedigree Summary
Martha + 2 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)