IW
Isaac Williams — 1930 US Census Record
Model Tree available1930 United States Federal Census · St Martin, Louisiana
Our Model Tree links this Isaac Williams across the 1910, 1920 and 1930 US Censuses in St Martin, Louisiana (XGBoost, ~Confirmed), with identified parents Joseph & Emma — first a head (b.~1905), then head of a 3-person household.
Age 25
b. ~1905
Male
Head
Born: Louisiana
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | St Martin, Louisiana |
| Surname | Williams |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Louisiana |
| Age at First Marriage | 18 |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | No |
| Home Owned/Rented | R |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
| Occupation | Laborer |
| Township / Ward | Ward 3 Quanch |
| 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.
3 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Isaac Williams | Head | — | 25 | ~1905 |
| Isaac Williams | Son | — | 6 | ~1924 |
| Irene Williams | Spouse | — | 21 | ~1909 |
Census Appearances
1910
St Landry, …
Son, age 8
St Landry, Louisiana · implied b. ~1902 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Louisiana |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
1920
St Martin, …
Son, age 17
St Martin, Louisiana · implied b. ~1903 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Louisiana |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
1930
St Martin, …
Head, age 25
St Martin, Louisiana · implied b. ~1905 — 3 household members
| Surname | Williams |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Louisiana |
| Age at First Marriage | 18 |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | No |
| Home Owned/Rented | R |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
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: father Joseph Williams (~0.92 confidence) and mother Emma Williams (~0.92 confidence) and father Dennis Williams (~0.92 confidence) and mother Francis Williams (~0.60 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.84
Father
Joseph Williams
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Emma Williams
b. ~1878
Source mother
● Household
· direct · ~0.92
Father
Dennis Williams
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Francis Williams
b. ~1890
Source mother
● Household
· direct · ~0.6
This person
Anchor record
Isaac Williams
Head · 1930 · age 25 · b. ~1905 · Louisiana
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — St Martin, Louisiana
Open full size
1930 US Federal Census — St Martin, Louisiana
Page Contents
50 people indexed on this census page (ia:1930:15thcensus821unit:0220)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Beatrice Menard | 18 | Daughter | — | Louisiana |
| 2 | Walter Menard | 16 | Brother | — | Louisiana |
| 3 | Arthur Menard | 14 | Brother | — | Louisiana |
| 4 | Lucille Menard | 11 | Sister | — | Louisiana |
| 5 | Roy Menard | 8 | Son | — | Louisiana |
| 6 | Edgar Menard | 6 | Son | — | Louisiana |
| 7 | Isaac Williams THIS PERSON | 25 | Head | Laborer | Louisiana |
| 8 | Irene Williams | 21 | Wife | — | Louisiana |
| 9 | Isaac Jr. Williams | 6 | Son | — | Louisiana |
| 10 | Cunnington Fournet | 33 | Head | Farmer | Louisiana |
| 11 | Mabel Fournet | 27 | Wife | — | Louisiana |
| 12 | Vincent Fournet | 16 | Brother | — | Louisiana |
| 13 | Lula Fournet | 13 | Sister | — | Louisiana |
| 14 | Beatrice Fournet | 11 | Sister | — | Louisiana |
| 15 | James Champagne | 42 | Head | Farmer | Louisiana |
| 16 | Mabel Champagne | 37 | Wife | — | Louisiana |
| 17 | Wilfred Champagne | 15 | Son | Laborer | Louisiana |
| 18 | John Champagne | 13 | Son | Laborer | Louisiana |
| 19 | Lula Champagne | 10 | Daughter | — | Louisiana |
| 20 | James Jr. Champagne | 8 | Son | — | Louisiana |
| 21 | Clarence Champagne | 3 | Son | — | Louisiana |
| 22 | Leo Robin | 41 | Head | Farmer | Louisiana |
| 23 | Yvonne Robin | 42 | Wife | — | Louisiana |
| 24 | Yvonne Robin | 17 | Daughter | — | Louisiana |
| 25 | Leo Robin | 15 | Son | Laborer | Louisiana |
| 26 | Louis Robin | 13 | Son | Laborer | Louisiana |
| 27 | Lucille Robin | 11 | Daughter | — | Louisiana |
| 28 | Lula Robin | 9 | Daughter | — | Louisiana |
| 29 | Clarence Robin | 7 | Son | — | Louisiana |
| 30 | Lester Robin | 5 | Son | — | Louisiana |
| 31 | Lynn Robin | 1 | Son | — | Louisiana |
| 32 | Cyril Bernard | 35 | Head | Farmer | Louisiana |
| 33 | Rita Bernard | 33 | Wife | — | Louisiana |
| 34 | Inez Bernard | 10 | Daughter | — | Louisiana |
| 35 | Leo Trahan | 20 | Head | Laborer | Louisiana |
| 36 | Yolande Trahan | 18 | Wife | — | Louisiana |
| 37 | Alice Trahan | 0 | Daughter | — | Louisiana |
| 38 | Dominic Ingulla | 20 | Head | Farmer | Louisiana |
| 39 | Annie Ingulla | 20 | Wife | — | Louisiana |
| 40 | Santo Milazzo | 49 | Head | Farmer | Italy |
| 41 | Lucia Milazzo | 37 | Wife | — | Louisiana |
| 42 | Louis Milazzo | 20 | Son | Laborer | Louisiana |
| 43 | Sam Milazzo | 18 | Son | Laborer | Louisiana |
| 44 | Marie Locker | 71 | Head | Farm Laborer | Louisiana |
| 45 | Lola Locker | 42 | Daughter | — | Louisiana |
| 46 | May Locker | 36 | Daughter | — | Louisiana |
| 47 | Louise Locker | 65 | Sister | — | Louisiana |
| 48 | Francis Gauthier | 46 | Head | Farm Manager | Louisiana |
| 49 | Edith Gauthier | 47 | Wife | — | Louisiana |
| 50 | Anna L. Gauthier | 18 | Daughter | — | Louisiana |
Pedigree Summary
Isaac
Gen 1 · 4 parents
~0.84
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)