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Bertha Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Vermilion-County, Illinois
Our Model Tree links this Bertha Thomas across the 1920, 1930 and 1940 US Censuses in Vermilion-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1899), then head of a 5-person household.
Age 41
b. ~1899
Female
Spouse
Born: Belgium
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Vermilion-County, Illinois |
| Surname | Thomas |
| Given Name | Bertha J |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Belgium |
| 1935 Residence (City) | Danville City |
| 1935 Residence (County) | Vermilion |
| Naturalization Status | Naturalized |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same House |
| Birth Country | Belgium |
| Birthplace (normalized) | belgium |
| Township / Ward | Danville City |
| Est. Birth Year | ~1899 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Bertha | Age | Birth yr |
|---|---|---|---|---|
| Bertha Thomas | Spouse | — | 41 | ~1899 |
| Edward Thomas | Head | — | 43 | ~1897 |
| Joseph Thomas | Son | — | 11 | ~1929 |
| Marie Thomas | Daughter | — | 18 | ~1922 |
| Martha Thomas | Daughter | — | 8 | ~1932 |
Census Appearances
1920
Palm Beach, …
Spouse, age 20
Palm Beach, Florida · implied b. ~1900 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Bertha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Married |
| Birthplace | Belgium |
| Year of Immigration | 1914 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Belgium |
| Mother's Birthplace | Belgium |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Belgium |
| Birth Country | Belgium |
| Year of Naturalization | 1919 |
| Birthplace (normalized) | belgium |
1930
Vermilion, Illinois
Spouse, age 31
Vermilion, Illinois · implied b. ~1899 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Bertha J |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Belgium |
| Naturalization Status | Naturalized |
| Year of Immigration | 1904 |
| Age at First Marriage | 18 |
| Father's Birthplace | Belgium |
| Mother's Birthplace | Belgium |
| Can Read/Write | Yes |
| Mother Tongue | Belgium |
| Veteran | No |
| Birth Country | Belgium |
| Birthplace (normalized) | belgium |
1940
Vermilion-County, Illinois
Spouse, age 41
Vermilion-County, Illinois · implied b. ~1899 — 5 household members
| Surname | Thomas |
| Given Name | Bertha J |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Belgium |
| 1935 Residence (City) | Danville City |
| 1935 Residence (County) | Vermilion |
| Naturalization Status | Naturalized |
| Class of Worker | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same House |
| Birth Country | Belgium |
| Birthplace (normalized) | belgium |
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 3 locations, using XGBoost record linkage.
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This person
Anchor record
Bertha Thomas
Spouse · 1940 · age 41 · b. ~1899 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Vermilion-County, Illinois
Open full size
1940 US Federal Census — Vermilion-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00898-00297)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Freeman Cockrell | 7 | Son | — | Illinois |
| 42 | Ernest H Ritter | 28 | Head | File Clerk | Illinois |
| 43 | Bessie Ritter | 19 | Wife | — | Illinois |
| 44 | James Ritter | 19 | Lodger | New Worker | Illinois |
| 45 | Rose Ritter | 56 | Mother | — | Illinois |
| 46 | Evelyn Ritter | 21 | Sister | Janitor | Illinois |
| 47 | Robert W Glavey | 34 | Head | Truck Driver | Illinois |
| 48 | Mabel Glavey | 29 | Wife | Cook | Illinois |
| 49 | Betty Ann Glavey | 8 | Daughter | — | Illinois |
| 50 | Laura Gladden | 63 | Head | — | Iowa |
| 51 | Dorothy Gladden | 35 | Daughter | Clerk | Illinois |
| 52 | Edward G Thomas | 43 | Head | Mattress Maker | Illinois |
| 53 | Bertha J Thomas THIS PERSON | 41 | Wife | — | Belgium |
| 54 | Marie Thomas | 18 | Daughter | Book-Binding | Illinois |
| 55 | Joseph Dale Thomas | 11 | Son | — | Illinois |
| 56 | Martha May Thomas | 8 | Daughter | — | Illinois |
| 57 | Roy C Donovan | 40 | Head | Maintenance | Illinois |
| 58 | Ella Donovan | 33 | Wife | — | Illinois |
| 59 | Clarence A Thomas | 37 | Head | Miner | Illinois |
| 60 | Della M Thomas | 24 | Wife | — | Illinois |
| 61 | Clarence A Thomas | 1 | Son | — | Illinois |
| 62 | Mary E Thomas | 68 | Mother | — | Illinois |
| 63 | Philip C Johnson | 45 | Head | Carpenter Helper | Indiana |
| 64 | Ocie Johnson | 34 | Wife | — | Indiana |
| 65 | Florence Johnson | 17 | Daughter | House Work | Indiana |
| 66 | Mary L Johnson | 14 | Daughter | — | Illinois |
| 67 | Helen Johnson | 13 | Daughter | — | Illinois |
| 68 | Eugene Johnson | 11 | Son | — | Illinois |
| 69 | Billy Johnson | 9 | Son | — | Illinois |
| 70 | Arbin G Wilson | 39 | Head | Maintenance | Kentucky |
| 71 | Daisy Wilson | 42 | Wife | — | Indiana |
| 72 | Arbin D Wilson | 11 | Son | — | Illinois |
| 73 | Darrel L Wilson | 10 | Son | — | Illinois |
| 74 | Iris D Wilson | 8 | Daughter | — | Illinois |
| 76 | Mary Joseph | 63 | Head | House Work | Illinois |
| 77 | Harry W Day | 39 | Head | — | Illinois |
| 78 | Helen Day | 27 | Wife | — | Illinois |
| 79 | Harry Day | 4 | Son | — | Illinois |
| 80 | Minnie Day | 64 | Mother | — | Illinois |
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)