MT
Mary Thomas — 1930 US Census Record
Model Tree available1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this Mary Thomas across the 1910, 1920 and 1930 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed), with identified parents William & John — first a daughter (b.~1901), then head of a 5-person household.
Age 29
b. ~1901
Female
Daughter
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Thomas |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| 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 | Baltimore City |
| Est. Birth Year | ~1901 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Thomas | Daughter | — | 29 | ~1901 |
| William Thomas | Head | — | 55 | ~1875 |
| William Thomas | Son | — | 22 | ~1908 |
| John Thomas | Son | — | 10 | ~1920 |
| Mary Thomas | Spouse | — | 51 | ~1879 |
Census Appearances
1910
Baltimore, Maryland
Daughter, age 8
Baltimore, Maryland · implied b. ~1902 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| 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 |
1920
Balto, Maryland
Daughter, age 17
Balto, Maryland · implied b. ~1903 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Paster |
| Industry | Tobacco factory |
| Class of Worker | W |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Daughter, age 29
Baltimore, Maryland · implied b. ~1901 — 5 household members
| Surname | Thomas |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| 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 |
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 Thomas across 3 US Census years (1910, 1920 and 1930) in 2 locations, using XGBoost record linkage. Identified parents: father William Thomas (~0.92 confidence) and father John Thomas (~0.92 confidence) and mother Mary Thomas (~0.92 confidence) and mother Mary Thomas (~0.92 confidence) and mother Mary Thomas (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Thomas
b. ~1875
Source father
● Household
· direct · ~0.92
Father
John Thomas
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Mary Thomas
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
Mary Thomas
b. ~1860
Source mother
● Household
· direct · ~0.92
Mother
Mary Thomas
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Thomas
Daughter · 1930 · age 29 · b. ~1901 · Maryland
★ You are viewing this record
Sibling
William Thomas
Sibling · 1930 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Thomas
Sibling · 1930 · age 10
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:1930:15thcensus865unit:0306)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Carrie Kuhland | 64 | Head | — | Maryland |
| 52 | George Kuhland | 47 | Son | Machinist | Maryland |
| 53 | Henry Kuhland | 34 | Son | Salesman | Maryland |
| 54 | Emma Lakin | 35 | Daughter | — | Maryland |
| 55 | Minnie Rykland | 44 | Daughter | Seamstress | Maryland |
| 56 | Charles Lakin | 35 | Son-in-law | Painter | Maryland |
| 57 | Caroline Lakin | 6 | Grand Daughter | — | Maryland |
| 58 | Sydney Williamson | 26 | Head | Chauffeur | Georgia |
| 59 | Honeybee Williamson | 23 | Wife | — | Georgia |
| 60 | John Williamson | 9 | Son | — | Georgia |
| 61 | James Williamson | 6 | Son | — | Maryland |
| 62 | Edwin Williamson | 3 | Son | — | Maryland |
| 63 | Mary Williamson | 2 | Daughter | — | Maryland |
| 64 | Annie Williamson | 0 | Daughter | — | Maryland |
| 65 | George Singer | 28 | Lodger | Fireman | South Carolina |
| 66 | Lillie Singer | 33 | Lodger | Cook | South Carolina |
| 67 | John Snyder | 77 | Head | Proprietor | New York |
| 68 | Mary Snyder | 69 | Wife | — | Maryland |
| 69 | William Snyder | 45 | Son | Clerical | Maryland |
| 70 | Minnie Snyder | 35 | Daughter | — | Maryland |
| 71 | John Snyder | 37 | Son | Chauffeur | Maryland |
| 72 | Charles Snyder | 10 | Son | — | Maryland |
| 73 | George L. Noll | 58 | Head | Painter | Kentucky |
| 74 | Henrietta Noll | 49 | Wife | — | Maryland |
| 75 | Theresia Noll | 12 | Daughter | — | Maryland |
| 76 | Francis Noll | 9 | Daughter | — | Maryland |
| 77 | William Thomas | 55 | Head | Carpenter | Maryland |
| 78 | Mary Thomas | 51 | Wife | — | Maryland |
| 79 | Mary Thomas THIS PERSON | 29 | Daughter | — | Maryland |
| 80 | William Thomas | 22 | Son | Carpenter | Maryland |
| 81 | John Thomas | 10 | Son | — | Maryland |
| 82 | Phillip Landsman | 38 | Head | Proprietor | Maryland |
| 83 | Bella Landsman | 35 | Wife | — | Maryland |
| 84 | Herbert Landsman | 12 | Son | — | Maryland |
| 85 | Shirley Landsman | 9 | Daughter | — | Maryland |
| 86 | David Landsman | 3 | Son | — | Maryland |
| 87 | Arie James | 56 | Head | — | Georgia |
| 88 | Jeraine James | 9 | Daughter | — | Maryland |
| 89 | Eva Williams | 24 | Daughter | Maid | Georgia |
| 90 | Raymond Williams | 5 | Grand Son | — | Maryland |
| 91 | John Foreman | 28 | Head | Janitor | North Carolina |
| 92 | Ethel Foreman | 24 | Wife | — | North Carolina |
| 93 | Bertha Hicks | 30 | Lodger | — | North Carolina |
| 94 | Agnes Thomas | 65 | Head | — | Maryland |
| 95 | John Wisner | 40 | Nephew | Chauffeur | Maryland |
| 96 | Alfred Calvert | 64 | Head | Chief | France |
| 97 | Elizabeth Calvert | 75 | Wife | — | Germany |
| 98 | Samuel Jones | 32 | Head | Laborer | South Carolina |
| 99 | Mary Jones | 30 | Wife | — | South Carolina |
| 100 | Florence Jones | 13 | Daughter | — | Maryland |
Related Census Records
Pedigree Summary
Mary + 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 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)