MW
Mary Williams — 1930 US Census Record
Model Tree available1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this Mary Williams across the 1910, 1920 and 1930 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed), with identified parents William & Florence — first a daughter (b.~1905), then head of a 5-person household.
Age 25
b. ~1905
Female
Daughter
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Williams |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Occupation | Salesperson |
| Industry | Bakery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Salesperson |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1905 |
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 Williams | Daughter | — | 25 | ~1905 |
| William Chesley | Head | — | 57 | ~1873 |
| De Williams | Other | — | 27 | ~1903 |
| James Williams | Son | — | 23 | ~1907 |
| Florence Chesley | Spouse | — | 50 | ~1880 |
Census Appearances
1910
Baltimore, Maryland
Daughter, age 6
Baltimore, Maryland · implied b. ~1904 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 6 |
| 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 16
Baltimore, Maryland · implied b. ~1904 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Mary A |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | Black |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laundry |
| Industry | Home |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Daughter, age 25
Baltimore, Maryland · implied b. ~1905 — 5 household members
| Surname | Williams |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Salesperson |
| Industry | Bakery |
| 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 Mary Williams across 3 US Census years (1910, 1920 and 1930) in Baltimore, Maryland, using XGBoost record linkage. Identified parents: father William Chesley (~0.92 confidence) and mother Florence Chesley (~0.92 confidence) and father Henry Williams (~0.92 confidence) and father Isaac Williams (~0.92 confidence) and mother Mary Williams (~0.92 confidence) and mother Rosa Williams (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Chesley
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Florence Chesley
b. ~1880
Source mother
● Household
· direct · ~0.92
Father
Henry Williams
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Isaac Williams
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Mary Williams
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Rosa Williams
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Williams
Daughter · 1930 · age 25 · b. ~1905 · Maryland
★ You are viewing this record
Sibling
James Williams
Sibling · 1930 · age 23
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:1930:15thcensus855unit:0512)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Sarah Keys | 21 | Head | — | Maryland |
| 52 | James Keys | 2 | Son | — | Maryland |
| 53 | Annetta Keys | 0 | Daughter | — | Maryland |
| 54 | Charles Bundy | 50 | Head | Laborer | Virginia |
| 55 | Cordelia Bundy | 55 | Wife | — | Virginia |
| 56 | Clarence Alexander | 22 | Lodger | Laborer | Virginia |
| 57 | Henry J. Merritt | 50 | Lodger | Coalman | Virginia |
| 58 | Lula Leary | 58 | Head | Laundress | Maryland |
| 59 | Edith Leary | 31 | Daughter | Maid | Maryland |
| 60 | Margaret Leary | 20 | Daughter | Cook | Maryland |
| 61 | Margaret Snowden | 75 | Sister | — | Maryland |
| 62 | Benjamin Snowden | 72 | Brother | — | Maryland |
| 63 | Charles Gray | 40 | Head | Keeper | Maryland |
| 64 | Annie Gray | 35 | Wife | — | Maryland |
| 65 | William Jenkins | 43 | Head | Warehouseman | Virginia |
| 66 | Sarah Jenkins | 55 | Wife | Maid | Maryland |
| 67 | Mamie Epps | 33 | Daughter | Domestic | Maryland |
| 68 | Eilen Palmer | 71 | Mother | — | Maryland |
| 69 | James Epps | 11 | Grandson | — | Maryland |
| 70 | George Hawkins | 34 | Head | — | Maryland |
| 71 | Mattie Hawkins | 35 | Wife | Laborer | Virginia |
| 72 | Elizabeth Hawkins | 7 | Daughter | — | Maryland |
| 73 | John Hawkins | 5 | Son | — | Maryland |
| 74 | Frances Hawkins | 3 | Daughter | — | Maryland |
| 75 | Roberta Hawkins | 1 | Daughter | — | Maryland |
| 76 | George Miller | 42 | Head | Laborer | South Carolina |
| 77 | Hazel Miller | 26 | Wife | — | South Carolina |
| 78 | Herbert Bell | 24 | Lodger | Laborer | Virginia |
| 79 | Benjamin Dickson | 25 | Lodger | Laborer | Virginia |
| 80 | Benjamin Simms | 55 | Lodger | Helper | South Carolina |
| 81 | William Chesley | 57 | Head | Waiter | Maryland |
| 82 | Florence Chesley | 50 | Wife | Maid | Maryland |
| 83 | De Long Williams | 27 | Lodger | Musician | Maryland |
| 84 | Mary Williams THIS PERSON | 25 | Daughter | Salesperson | Maryland |
| 85 | James Williams | 23 | Son | Waiter | Maryland |
| 86 | Richard Duke | 52 | Head | Waiter | Virginia |
| 87 | Columbia Duke | 52 | Wife | — | Virginia |
| 88 | Geneva Hill | 32 | Daughter | Domestic | Maryland |
| 89 | Marina Hill | 8 | Granddaughter | — | Maryland |
| 90 | Helen Hill | 7 | Granddaughter | — | Maryland |
| 91 | Dora Hill | 5 | Granddaughter | — | Maryland |
| 92 | Roberta Jessels | 19 | Boarder | — | Virginia |
| 93 | Archie Simms | 26 | Lodger | Domestic | North Carolina |
| 94 | Frank Fry | 55 | Head | Laborer | Georgia |
| 95 | Mattie Fry | 36 | Wife | Laundress | South Carolina |
| 96 | Rosalie Mangle | 2 | Adopted Daughter | — | Maryland |
| 97 | Roberta Cook | 33 | Head | Laundress | Maryland |
| 98 | Mary Johnson | 31 | Sister | Domestic | Maryland |
| 99 | William Cook | 11 | Son | Porter | Maryland |
| 100 | Thomas Thomas | 41 | Lodger | Laborer | Maryland |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 6 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)