PT
Pearl Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Winnebago-County, Illinois
Our Model Tree links this Pearl Thomas across the 1920, 1930 and 1940 US Censuses in Winnebago-County, Illinois (XGBoost, ~Confirmed), with identified parents Peter & Peter — first a daughter (b.~1909), then head of a 2-person household.
Age 31
b. ~1909
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Winnebago-County, Illinois |
| Surname | Thomas |
| Given Name | Pearl |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Rockford City |
| 1935 Residence (County) | Winnebago |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Rockford City |
| Est. Birth Year | ~1909 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Pearl | Age | Birth yr |
|---|---|---|---|---|
| Peter Thomas | Head | — | 57 | ~1883 |
| Pearl Thomas | Daughter | — | 31 | ~1909 |
Census Appearances
1920
Winnebago, Illinois
Daughter, age 11
Winnebago, Illinois · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Pearl |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Germany |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Winnebago, Illinois
Daughter, age 22
Winnebago, Illinois · implied b. ~1908 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Pearl |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Germany |
| Occupation | Clerk |
| Industry | Grocery Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Winnebago-County, Illinois
Daughter, age 31
Winnebago-County, Illinois · implied b. ~1909 — 2 household members
| Surname | Thomas |
| Given Name | Pearl |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Rockford City |
| 1935 Residence (County) | Winnebago |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Pearl Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Peter Thomas (~0.92 confidence) and father Peter Thomas (~0.92 confidence) and father Titus Thomas (~0.92 confidence) and mother Lydia Thomas (~0.92 confidence) and mother Julia Thomas (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Peter Thomas
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Peter Thomas
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Titus Thomas
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Lydia Thomas
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Julia Thomas
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Pearl Thomas
Daughter · 1940 · age 31 · b. ~1909 · 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 — Winnebago-County, Illinois
Open full size
1940 US Federal Census — Winnebago-County, Illinois
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-00914-00123)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Carl G. Carlson | 66 | Head | Finisher | Sweden |
| 2 | Maria Carlson | 58 | Wife | — | Sweden |
| 3 | Carl E. Carlson | 20 | Son | Parts & Die Maker Helper | Illinois |
| 4 | Evan Carlson | 19 | Son | Machine Shop Maker Helper | Illinois |
| 5 | Eric Johnson | 40 | Head | Foreman | Illinois |
| 6 | Mildred Johnson | 38 | Wife | — | Italy |
| 7 | Elaine Johnson | 16 | Daughter | — | Illinois |
| 8 | Kathleen Johnson | 13 | Daughter | — | Illinois |
| 9 | Daniel Anderson | 51 | Head | Tool Maker | Sweden |
| 10 | Axelina Anderson | 51 | Wife | — | Sweden |
| 11 | George Pellant | 32 | Head | Truck Driver | Illinois |
| 12 | Alice Pellant | 28 | Wife | — | Illinois |
| 13 | William Pellant | 6 | Son | — | Illinois |
| 14 | Robert Pellant | 3 | Son | — | Illinois |
| 15 | Joan Pellant | 1 | Daughter | — | Illinois |
| 16 | Ida Pellant | 71 | Mother | — | Wisconsin |
| 17 | Elmer Johnson | 34 | Head | Sign Painter | Illinois |
| 18 | Eileen Johnson | 25 | Wife | — | Wisconsin |
| 19 | Paddie Johnson | 19 | Brother | Trucker | Illinois |
| 20 | Ida Rosene | 62 | Head | — | Sweden |
| 21 | Elmer Peterson | 28 | Head | Assembler | Illinois |
| 22 | Lois Peterson | 25 | Wife | Proprietor | Illinois |
| 23 | Peter Thomas | 57 | Head | Proprietor | Wisconsin |
| 24 | Pearl Thomas THIS PERSON | 31 | Daughter | — | Illinois |
| 25 | Hillis Buelow | 62 | Head | Cutter | Iowa |
| 26 | Emma Buelow | 63 | Wife | — | Iowa |
| 27 | Emmie Buelow | 27 | Daughter | Bookkeeper | Iowa |
| 28 | Earl Allen | 46 | Head | Manager | Illinois |
| 29 | Elsie Allen | 43 | Wife | — | Nebraska |
| 30 | Betty Lou Allen | 11 | Daughter | — | Illinois |
| 31 | John Logli | 26 | Head | Proprietor | Illinois |
| 32 | Phyllis Logli | 22 | Wife | — | Iowa |
| 33 | Mathias Lundquist | 58 | Head | Blacksmith | Sweden |
| 34 | Johanna Lundquist | 60 | Wife | — | Sweden |
| 35 | Helga Lundquist | 34 | Daughter | Teacher | Sweden |
| 36 | Hilma Johnson | 65 | Head | — | Sweden |
| 37 | Benjamin Beldeen | 70 | Head | Designer & Modeler | Sweden |
| 38 | Amanda C. Beldeen | 74 | Wife | — | Sweden |
Pedigree Summary
Pearl
Gen 1 · 5 parents
~0.92
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)