MH
Mary Hamilton — 1930 US Census Record
Model Tree available1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this Mary Hamilton across the 1910, 1920, 1930 and 1940 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed), with identified parents John & Alice — first a daughter (b.~1912), then head of a 6-person household.
Age 18
b. ~1912
Female
Daughter
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Hamilton |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | 7Th District Pt |
| Est. Birth Year | ~1912 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Hamilton | Daughter | — | 18 | ~1912 |
| Alice Hamilton | Head | — | 51 | ~1879 |
| Harry Hamilton | Son | — | 15 | ~1915 |
| Clifton Hamilton | Son | — | 18 | ~1912 |
| Maurice Hamilton | Son | — | 13 | ~1917 |
| Lawrence Hamilton | Son | — | 19 | ~1911 |
Census Appearances
1910
Baltimore, Maryland
Daughter, age
Baltimore, Maryland · implied b. ~1910 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Myrtle L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| 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 |
1920
Baltimore, Maryland
Daughter, age 9
Baltimore, Maryland · implied b. ~1911 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Mary F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 9 |
| 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 18
Baltimore, Maryland · implied b. ~1912 — 6 household members
| Surname | Hamilton |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
Spouse, age 29
Baltimore-County, Maryland · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Margaret M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Baltimore |
| Industry | H |
| Class of Worker | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Maryland |
| 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 Hamilton across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Hamilton (~0.92 confidence) and mother Alice Hamilton (~0.92 confidence) and father William Hamilton (~0.92 confidence) and mother Victoria Hamilton (~0.92 confidence) and mother Anna Hamilton (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Hamilton
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Alice Hamilton
b. ~1879
Source mother
● Household
· direct · ~0.92
Father
William Hamilton
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Victoria Hamilton
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Anna Hamilton
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Hamilton
Daughter · 1930 · age 18 · b. ~1912 · Maryland
★ You are viewing this record
Sibling
Lawrence Hamilton
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maurice Hamilton
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clifton Hamilton
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harry Hamilton
Sibling · 1930 · 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
1930 US Federal Census — Baltimore, Maryland
Open full size
1930 US Federal Census — Baltimore, Maryland
Page Contents
50 people indexed on this census page (ia:1930:15thcensus846unit:0331)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Clarence Mays | 48 | Head | Farmer | Maryland |
| 2 | Anna Mays | 46 | Wife | — | Maryland |
| 3 | Clinton Tracey | 24 | Head | Laborer | Maryland |
| 4 | Nellie Tracey | 23 | Wife | — | Maryland |
| 5 | Clarence Tracey | 5 | Son | — | Maryland |
| 6 | Dorothy Tracey | 2 | Daughter | — | Maryland |
| 7 | Harry Miller | 39 | Head | — | Maryland |
| 8 | Martha Miller | 25 | Wife | Dressmaker | Maryland |
| 9 | Harry Miller | 13 | Son | — | Maryland |
| 10 | Hilda Miller | 12 | Daughter | — | Maryland |
| 11 | Edgar Miller | 9 | Son | — | Maryland |
| 12 | William Hoffman | 64 | Head | Proprietor | Maryland |
| 13 | Anna Hoffman | 55 | Wife | — | Maryland |
| 14 | Ross Hoffman | 20 | Son | Laborer | Maryland |
| 15 | Eugene Hoffman | 19 | Son | Lineman | Maryland |
| 16 | Rachel Hoffman | 18 | Daughter | — | Maryland |
| 17 | Joseph Hoffman | 17 | Son | Clerk | Maryland |
| 18 | Paul Hoffman | 13 | Son | Janitor | Maryland |
| 19 | Dennis Hoffman | 9 | Son | — | Maryland |
| 20 | Arthur Smith | 46 | Boarder | Proprietor | Maryland |
| 21 | George Mays | 53 | Head | Foreman | Maryland |
| 22 | Walter Mays | 23 | Son | Chauffeur | Maryland |
| 23 | Pearl Mays | 22 | Daughter-in-law | — | Maryland |
| 24 | Gladys Mays | 5 | Daughter | — | Maryland |
| 25 | Margurite Mays | 3 | Daughter | — | Maryland |
| 26 | Alice Hamilton | 51 | Head | Farmer | Maryland |
| 27 | Lawrence Hamilton | 19 | Son | Laborer | Maryland |
| 28 | Mary Hamilton THIS PERSON | 18 | Daughter | — | Maryland |
| 29 | Clifton Hamilton | 18 | Son | — | Maryland |
| 30 | Harry Hamilton | 15 | Son | — | Maryland |
| 31 | Maurice Hamilton | 13 | Son | — | Maryland |
| 32 | Ambrose Ohler | 53 | Head | Carpenter | Maryland |
| 33 | Mary Ohler | 45 | Wife | — | Maryland |
| 34 | Bernard Ohler | 7 | Son | — | Maryland |
| 35 | Paul Ohler | 65 | Boarder | — | Maryland |
| 36 | Blaine Mays | 43 | Head | Farmer | Maryland |
| 37 | Carrie Mays | 43 | Wife | — | Maryland |
| 38 | Harry Mays | 16 | Son | — | Maryland |
| 39 | Bernice Mays | 13 | Daughter | — | Maryland |
| 40 | Josephine Mays | 10 | Daughter | — | Maryland |
| 41 | Irene Mays | 10 | Daughter | — | Maryland |
| 42 | Charles Mays | 2 | Son | — | Maryland |
| 43 | Howard Mays | 22 | Head | Laborer | Maryland |
| 44 | Gertrude Mays | 36 | Wife | — | Maryland |
| 45 | James Mays | 4 | Son | — | Maryland |
| 46 | Jacob Mays | 19 | Head | Lineman | Maryland |
| 47 | Dorothy Mays | 18 | Wife | — | Maryland |
| 48 | Lawrence Chilcoat | 39 | Head | Farmer | Maryland |
| 49 | Olive Chilcoat | 41 | Wife | — | Maryland |
| 50 | George Chilcoat | 16 | Son | — | Maryland |
Related Census Records
Pedigree Summary
Mary + 4 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 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)