WC
William Cooper — 1940 US Census Record
Model Tree available1940 United States Federal Census · Iberia-County, Louisiana
Our Model Tree links this William Cooper across the 1920, 1930 and 1940 US Censuses in Iberia-County, Louisiana (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1911), then head of a 4-person household.
Age 29
b. ~1911
Male
Son
Born: Louisiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Iberia-County, Louisiana |
| Surname | Cooper |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Louisiana |
| 1935 Residence (City) | New Iberia |
| 1935 Residence (County) | Iberia |
| Additional Details | |
| Occupation | Paper Hanger |
| Industry | Bldg Const |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 600 |
| Highest Grade | No 7 |
| 1935 Residence | Louisiana |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
| Occupation | Paper Hanger |
| Township / Ward | New Iberia |
| Est. Birth Year | ~1911 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Lina Cooper | Daughter | — | 21 | ~1919 |
| Lillian Cooper | Head | — | 41 | ~1899 |
| Samuel Cooper | Son | — | 22 | ~1918 |
| William Cooper | Son | — | 29 | ~1911 |
Census Appearances
1920
Iberia, Louisiana
Son, age 9
Iberia, Louisiana · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | William Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Louisiana |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
1930
Iberia, Louisiana
Son, age 19
Iberia, Louisiana · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Louisiana |
| Age at First Marriage | 16 |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Occupation | Laborer |
| Industry | Odd jobs |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
1940
Iberia-County, Louisiana
Son, age 29
Iberia-County, Louisiana · implied b. ~1911 — 4 household members
| Surname | Cooper |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Louisiana |
| 1935 Residence (City) | New Iberia |
| 1935 Residence (County) | Iberia |
| Occupation | Paper Hanger |
| Industry | Bldg Const |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 600 |
| Highest Grade | No 7 |
| 1935 Residence | Louisiana |
| 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 William Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Cooper (~0.92 confidence) and father William Cooper (~0.92 confidence) and mother Lillian Cooper (~0.92 confidence) and mother Lillian Cooper (~0.92 confidence) and mother Lillian Cooper (~0.60 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.86
Father
William Cooper
b. ~1871
Source father
● Household
· direct · ~0.92
Father
William Cooper
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Lillian Cooper
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Lillian Cooper
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Lillian Cooper
b. ~1899
Source mother
● Household
· direct · ~0.6
This person
Anchor record
William Cooper
Son · 1940 · age 29 · b. ~1911 · Louisiana
★ You are viewing this record
Sibling
Lina Cooper
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Samuel Cooper
Sibling · 1940 · age 22
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
1940 US Federal Census — Iberia-County, Louisiana
Open full size
1940 US Federal Census — Iberia-County, Louisiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01403-00602)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jerald Neville | 12 | Son | — | Louisiana |
| 42 | Ernest Broussard | 57 | Head | Laborer | Louisiana |
| 43 | Edna Broussard | 56 | Wife | — | Louisiana |
| 44 | Edmae Broussard | 30 | Daughter | — | Louisiana |
| 45 | Efrae Broussard | 29 | Daughter | Laborer | Louisiana |
| 46 | Lillian Cooper | 41 | Head | — | Louisiana |
| 47 | William Cooper THIS PERSON | 29 | Son | Paper Hanger | Louisiana |
| 48 | Samuel Cooper | 22 | Son | Laborer | Louisiana |
| 49 | Lina Cooper | 21 | Daughter | Servant | Louisiana |
| 50 | Johnnie Barrideaux | 46 | Head | Laborer | Louisiana |
| 51 | Amy Barrideaux | 41 | Wife | — | Louisiana |
| 52 | Eunice Barrideaux | 21 | Daughter | Cook | Louisiana |
| 53 | Hilton Barrideaux | 19 | Son | Laborer | Louisiana |
| 54 | Melville Barrideaux | 17 | Son | Laborer | Louisiana |
| 55 | Wilson Barrideaux | 14 | Son | — | Louisiana |
| 56 | Eliza Barrideaux | 12 | Daughter | — | Louisiana |
| 57 | Nadine Barrideaux | 9 | Daughter | — | Louisiana |
| 58 | Emma Lee Barrideaux | 7 | Daughter | — | Louisiana |
| 59 | Oran Barrideaux | 5 | Son | — | Louisiana |
| 60 | Barbara Barrideaux | 1 | Daughter | — | Louisiana |
| 61 | Roland Dennison | 52 | Head | Shipping Clerk | Louisiana |
| 62 | Blanche Dennison | 52 | Wife | — | Louisiana |
| 63 | Roland Jr. Dennison | 19 | Son | Laborer | Louisiana |
| 64 | Elaine Dennison | 15 | Daughter | — | Louisiana |
| 65 | Armine Dennison | 11 | Daughter | — | Louisiana |
| 66 | Joe Lanza | 25 | Head | Salesman | Louisiana |
| 67 | Elise Lanza | 25 | Wife | — | Louisiana |
| 68 | Noland B Lanza | 0 | Son | — | Louisiana |
| 69 | Frank Barrilleaux | 36 | Head | Mechanic | Louisiana |
| 70 | Theresa Barrilleaux | 29 | Wife | — | Louisiana |
| 71 | Melvin Barrilleaux | 15 | Son | — | Louisiana |
| 72 | Ronald Barrilleaux | 4 | Son | — | Louisiana |
| 73 | Delores Barrilleaux | 0 | Daughter | — | Louisiana |
| 74 | Denis Barrilleaux | 57 | Father | — | Louisiana |
| 75 | Wiley Herbert | 31 | Head | Bricklayer | Louisiana |
| 76 | Winnie Herbert | 29 | Wife | — | Louisiana |
| 77 | Delores Herbert | 5 | Daughter | — | Louisiana |
| 78 | David Nolan Herbert | 23 | Cousin | Receptionist | Louisiana |
| 79 | Oswald J. Eldridge | 31 | Head | Salesman | Louisiana |
| 80 | Ruth D. Eldridge | 27 | Wife | — | Louisiana |
Pedigree Summary
William + 2 siblings
Gen 1 · 5 parents
~0.86
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)