BT
Bertha Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Bertha Thomas across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1882), then head of a 3-person household.
Age 58
b. ~1882
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Thomas |
| Given Name | Bertha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Chicago |
| Est. Birth Year | ~1882 |
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 1940 census.
| Name | Relation to head | Relative to Bertha | Age | Birth yr |
|---|---|---|---|---|
| William Thomas | Head | — | 58 | ~1882 |
| Alice Thomas | Daughter | — | 21 | ~1919 |
| Bertha Thomas | Spouse | — | 58 | ~1882 |
Census Appearances
1920
Cook, Illinois
Spouse, age 37
Cook, Illinois · implied b. ~1883 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Bertha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Mulatto |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Cook, Illinois
Spouse, age 48
Cook, Illinois · implied b. ~1882 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Bertha B. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | Black |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 26 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Ohio |
| Occupation | manager |
| Industry | Restaurant |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Cook-County, Illinois
Spouse, age 58
Cook-County, Illinois · implied b. ~1882 — 3 household members
| Surname | Thomas |
| Given Name | Bertha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Bertha Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Bertha Thomas
Spouse · 1940 · age 58 · b. ~1882 · 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-t0627-00924-00221)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Jr Jones | 9 | Son | — | Illinois |
| 42 | Katie Jarrett | 35 | Head | New Worker | Mississippi |
| 43 | Barbara Jarrett | 16 | Daughter | — | Illinois |
| 44 | Bernice Jarrett | 14 | Daughter | — | Illinois |
| 45 | John L Brown | 32 | Head | Time Keeper | Georgia |
| 46 | Willa Brown | 22 | Wife | — | Alabama |
| 47 | John Jr Brown | 11 | Son | — | Illinois |
| 48 | Yvonne Brown | 7 | Daughter | — | Illinois |
| 49 | Maurice Brown | 3 | Son | — | Illinois |
| 50 | Minnie Whitefield | 37 | Head | — | Alabama |
| 51 | Dolores Whitefield | 11 | Daughter | — | Illinois |
| 52 | George Polk | 56 | Lodger | Iron Moulder | Mississippi |
| 53 | James Tribett | 26 | Head | Laborer | Mississippi |
| 54 | Dora Tribett | 26 | Wife | — | Illinois |
| 55 | Lois Tribett | 6 | Daughter | — | Illinois |
| 56 | Lorraine Tribett | 5 | Daughter | — | Illinois |
| 57 | Patricia Tribett | 1 | Daughter | — | Illinois |
| 58 | Joshua Mcneil | 50 | Head | Painter | Mississippi |
| 59 | Cora Mcneil | 40 | Wife | — | Georgia |
| 60 | Mary Harriss | 48 | Head | Seamstress | Ohio |
| 61 | William Thomas | 58 | Head | Waiter | Alabama |
| 62 | Bertha Thomas THIS PERSON | 58 | Wife | — | Massachusetts |
| 63 | Alice Thomas | 21 | Daughter | — | Illinois |
| 64 | Arthur Chester | 31 | Head | Machinist | Mississippi |
| 65 | Carrie Chester | 21 | Wife | — | Mississippi |
| 66 | Roscoe Davis | 15 | Son | — | Mississippi |
| 67 | Charles Davis | 8 | Son | — | Illinois |
| 68 | Willie Paynes | 46 | Head | Laborer | Mississippi |
| 69 | Willie Jr Paynes | 17 | Son | — | Louisiana |
| 70 | Sylvester Walker | 30 | Lodger | Truck Driver | Mississippi |
| 71 | Lenora Walker | 20 | Lodger | Maid | Mississippi |
| 72 | Mary Casey | 45 | Lodger | New Worker | Louisiana |
| 73 | Isaac Carrie | 43 | Head | Maid | Kentucky |
| 74 | Alice Carrie | 20 | Daughter | New Worker | Illinois |
| 75 | Marshall Carrie | 15 | Son | — | Illinois |
| 76 | Geraldine Carrie | 5 | Daughter | — | Illinois |
| 77 | John Bailey | 57 | Head | Watchman | South Carolina |
| 78 | Mary Bailey | 37 | Wife | — | South Carolina |
| 79 | Nannie Whitley | 43 | Lodger | — | Alabama |
| 80 | Fred Stevens | 32 | Lodger | Delivery Man | Florida |
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)