EW
Effie Williams — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Effie Williams across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1910), then head of a 9-person household.
Age 30
b. ~1910
Female
Spouse
Born: Georgia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Williams |
| Given Name | Effie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Georgia |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | G 8 |
| 1935 Residence | Same place |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1910 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Effie | Age | Birth yr |
|---|---|---|---|---|
| Wayne Williams | Son | — | 4 | ~1936 |
| Ernest Williams | Son | — | 8 | ~1932 |
| Reginald Williams | Son | — | ~1940 | |
| Ernest Williams | Head | — | 37 | ~1903 |
| Effie Williams | Spouse | — | 30 | ~1910 |
| Ronald Williams | Son | — | 5 | ~1935 |
| Betty Williams | Daughter | — | 9 | ~1931 |
| Donald Williams | Son | — | 6 | ~1934 |
| Gwendolyn Williams | Daughter | — | 3 | ~1937 |
Census Appearances
1930
Cook, Illinois
Other, age 20
Cook, Illinois · implied b. ~1910 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Effie |
| Relationship to Head | Lodger |
| Sex | F |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Married |
| Birthplace | Georgia |
| Age at First Marriage | 20 |
| Father's Birthplace | Georgia |
| Mother's Birthplace | Georgia |
| Can Read/Write | No |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
1940
Cook-County, Illinois
Spouse, age 30
Cook-County, Illinois · implied b. ~1910 — 9 household members
| Surname | Williams |
| Given Name | Effie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Georgia |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Highest Grade | G 8 |
| 1935 Residence | Same place |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
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 Effie Williams across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Effie Williams
Spouse · 1940 · age 30 · b. ~1910 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00926-00818)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lawrence Jackson | 29 | Head | Laborer | Illinois |
| 2 | Eula Mae Jackson | 25 | Wife | — | Alabama |
| 3 | Charles Jackson | 8 | Son | — | Illinois |
| 4 | Dorothy Jackson | 7 | Daughter | — | Illinois |
| 5 | Robert Jackson | 5 | Son | — | Illinois |
| 6 | Eula Mae Jackson | 3 | Daughter | — | Illinois |
| 7 | Wendell Jackson | 2 | Son | — | Illinois |
| 8 | Monna Jackson | 0 | Daughter | — | Illinois |
| 9 | Arthur Leonard | 22 | Boarder | Laborer | Illinois |
| 10 | Cornelia Leonard | 19 | Boarder | — | Illinois |
| 11 | Barbara Leonard | 1 | Niece | — | Illinois |
| 12 | Reynold Jackson | 51 | Head | Laborer | Texas |
| 13 | Arlene Jackson | 41 | Wife | — | Texas |
| 14 | James Jackson | 26 | Son | Mechanic | Texas |
| 15 | Lenora Jackson | 21 | Daughter | Seamstress | Texas |
| 16 | Joseph Jackson | 18 | Son | C.C.C. | Texas |
| 17 | Nelson Ruff | 31 | Lodger | — | Georgia |
| 18 | Betty Lou Ruff | 25 | Lodger | — | Illinois |
| 19 | Curtis Thrasher | 44 | Head | — | Mississippi |
| 20 | Delores Thrasher | 14 | Daughter | — | Illinois |
| 21 | Howell Thrasher | 11 | Son | — | Illinois |
| 22 | Lloyd Thrasher | 11 | Son | — | Illinois |
| 23 | Betty Thrasher | 7 | Daughter | — | Illinois |
| 24 | Justine King | 21 | Daughter | — | Illinois |
| 25 | Joseph Brooks | 68 | Head | — | Missouri |
| 26 | George Harrison | 52 | Lodger | Laundress | Kentucky |
| 27 | Willie Riggs | 34 | Lodger | Matron | Georgia |
| 28 | Irene Atkins | 47 | Head | Cook | Georgia |
| 29 | Lillie Mae Bass | 32 | Lodger | — | Alabama |
| 30 | Elizabeth Clemons | 19 | Daughter | Tray Worker | Georgia |
| 31 | Ernest Williams | 37 | Head | Laborer | Georgia |
| 32 | Effie Williams THIS PERSON | 30 | Wife | — | Georgia |
| 33 | Betty Williams | 9 | Daughter | — | Illinois |
| 34 | Ernest Jr. Williams | 8 | Son | — | Illinois |
| 35 | Donald Williams | 6 | Son | — | Illinois |
| 36 | Ronald Williams | 5 | Son | — | Illinois |
| 37 | Wayne Williams | 4 | Son | — | Illinois |
| 38 | Gwendolyn Williams | 3 | Daughter | — | Illinois |
| 39 | Reginald Williams | 0 | Son | — | Illinois |
| 40 | Cole Bradshaw | 75 | Head | — | No. Carolina |
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)