IW
Isaac Williams — 1930 US Census Record
Model Tree available1930 United States Federal Census · None, Maryland
Our Model Tree links this Isaac Williams across the 1910, 1920 and 1930 US Censuses in Maryland (XGBoost, ~Confirmed), with identified parents Rosa & Andrew — first a son (b.~1900), then head of a 8-person household.
Age 30
b. ~1900
Male
Son
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | None, Maryland |
| Surname | Williams |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Occupation | Laborer |
| Industry | Fertilizer Plant |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Laborer |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1900 |
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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Cecelia Hollie | Daughter | — | 4 | ~1926 |
| Cecelia Williams | Daughter | — | 20 | ~1910 |
| Rose Hollie | Daughter | — | 32 | ~1898 |
| Andrew Williams | Head | — | 62 | ~1868 |
| Andrew Williams | Son | — | 13 | ~1917 |
| John Williams | Son | — | 24 | ~1906 |
| Isaac Williams | Son | — | 30 | ~1900 |
| Cecelia Williams | Spouse | — | 60 | ~1870 |
Census Appearances
1910
Talbot, Maryland
Son, age 10
Talbot, Maryland · implied b. ~1900 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | General |
| Industry | Laborer |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1920
None, Maryland
Son, age 19
None, Maryland · implied b. ~1901 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Mattress Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
None, Maryland
Son, age 30
None, Maryland · implied b. ~1900 — 8 household members
| Surname | Williams |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Fertilizer Plant |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| 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 Isaac Williams across 3 US Census years (1910, 1920 and 1930) in 2 locations, using XGBoost record linkage. Identified parents: mother Rosa Williams (~0.92 confidence) and father Andrew Williams (~0.92 confidence) and mother Cecelia Williams (~0.92 confidence) and mother Mary Williams (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Rosa Williams
b. ~1862
Source mother
● Household
· direct · ~0.92
Father
Andrew Williams
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Cecelia Williams
b. ~1870
Source mother
● Household
· direct · ~0.92
Mother
Mary Williams
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Isaac Williams
Son · 1930 · age 30 · b. ~1900 · Maryland
★ You are viewing this record
Sibling
John Williams
Sibling · 1930 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cecelia Hollie
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cecelia Williams
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Hollie
Sibling · 1930 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Andrew Williams
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 — None, Maryland
Open full size
1930 US Federal Census — None, Maryland
Page Contents
50 people indexed on this census page (ia:1930:15thcensus861unit:0080)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Louis Dallinger | 51 | Head | Proprietor | Rumania |
| 2 | Bessie Dallinger | 31 | Wife | — | Russia |
| 3 | Virginia Scott | 32 | Head | Cook | Virginia |
| 4 | Lulu Bailey | 85 | Mother | — | Virginia |
| 5 | Parker Bailey | 52 | Brother | Cook | Virginia |
| 6 | James Watson | 36 | Head | Stevedore | Virginia |
| 7 | Gilla May Watson | 34 | Wife | — | Virginia |
| 8 | Edward Baker | 30 | Head | Porter | South Carolina |
| 9 | Annie M. Baker | 30 | Wife | — | South Carolina |
| 10 | Roberta Baker | 13 | Daughter | — | South Carolina |
| 11 | Edith Baker | 10 | Daughter | — | Maryland |
| 12 | Andrew Williams | 62 | Head | Valet | Virginia |
| 13 | Cecelia Williams | 60 | Wife | — | Maryland |
| 14 | Isaac Williams THIS PERSON | 30 | Son | Laborer | Maryland |
| 15 | John Williams | 24 | Son | Mechanic | Maryland |
| 16 | Cecelia Williams | 20 | Daughter | Maid | Maryland |
| 17 | Andrew Williams | 13 | Son | — | Maryland |
| 18 | Rose Hollie | 32 | Daughter | Cook | Maryland |
| 19 | Cecelia Hollie | 4 | Daughter | — | Maryland |
| 20 | Victoria Williams | 34 | Head | Cook | Maryland |
| 21 | Isaac Edmonds | 46 | Head | Waiter | Maryland |
| 22 | Edith Edmonds | 38 | Wife | — | Maryland |
| 23 | Walter Edmonds | 22 | Son | — | Maryland |
| 24 | Kermitt Edmonds | 21 | Son | Chauffeur | Maryland |
| 25 | Yacontis Edmonds | 19 | Daughter | — | Maryland |
| 26 | James Edmonds | 16 | Son | — | Maryland |
| 27 | Vernon Edmonds | 14 | Son | — | Maryland |
| 28 | Junial Edmonds | 12 | Son | — | Maryland |
| 29 | Yuriel Edmonds | 10 | Son | — | Maryland |
| 30 | Thurman Edmonds | 4 | Son | — | Maryland |
| 31 | Tessie Holloway | 30 | Head | Porter | South Carolina |
| 32 | Thelma Holloway | 13 | Daughter | — | South Carolina |
| 33 | Norman Holloway | 10 | Son | — | South Carolina |
| 34 | Joseph Owens | 22 | Head | Laborer | Maryland |
| 35 | Mamie Owens | 21 | Wife | Laundress | Maryland |
| 36 | James Shilton | 30 | Head | Fireman | Virginia |
| 37 | Ella Shilton | 34 | Wife | Laundress | North Carolina |
| 38 | Frank L. Lassiter | 14 | Step Son | Machine Operator | North Carolina |
| 39 | Earnest Shilton | 10 | Son | — | Virginia |
| 40 | William Shilton | 8 | Son | — | Virginia |
| 41 | Annabelle Corle | 48 | Head | Domestic | Maryland |
| 42 | Florence Corle | 12 | Daughter | — | Maryland |
| 43 | Washington Johnson | 54 | Head | Retired | Maryland |
| 44 | Ella Johnson | 39 | Daughter | — | Maryland |
| 45 | Ida Johnson | 16 | Daughter | — | Maryland |
| 46 | Joseph Dorsey | 12 | Head | Cook | Maryland |
| 47 | Gertrude Dorsey | 43 | Wife | Cook | Maryland |
| 48 | Carolina Dorsey | 18 | Daughter | — | Maryland |
| 49 | Alice Dorsey | 11 | Daughter | — | Maryland |
| 50 | Josephine Dorsey | 9 | Daughter | — | Maryland |
Pedigree Summary
Isaac + 5 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)