WC
William Carroll — 1940 US Census Record
Model Tree available1940 United States Federal Census · Stephenson-County, Illinois
Our Model Tree links this William Carroll across the 1920, 1930 and 1940 US Censuses in Stephenson-County, Illinois (XGBoost, ~Confirmed), with identified parents George & Francis — first a son (b.~1917), then head of a 3-person household.
Age 23
b. ~1917
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Stephenson-County, Illinois |
| Surname | Carroll |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Freeport City |
| 1935 Residence (County) | Stephenson |
| Additional Details | |
| Occupation | Claim Dept. |
| Industry | Auto Insurance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Claim Dept. |
| Township / Ward | Freeport City |
| Est. Birth Year | ~1917 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Mary Carroll | Daughter | — | 26 | ~1914 |
| Francis Carroll | Head | — | 51 | ~1889 |
| William Carroll | Son | — | 23 | ~1917 |
Census Appearances
1920
Stephenson, Illinois
Son, age 3
Stephenson, Illinois · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | William C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Stephenson, Illinois
Son, age 13
Stephenson, Illinois · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Stephenson-County, Illinois
Son, age 23
Stephenson-County, Illinois · implied b. ~1917 — 3 household members
| Surname | Carroll |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Freeport City |
| 1935 Residence (County) | Stephenson |
| Occupation | Claim Dept. |
| Industry | Auto Insurance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | H-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 William Carroll across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Carroll (~0.92 confidence) and father Francis Carroll (~0.92 confidence) and mother Frances Carroll (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Carroll
b. ~1879
Source father
● Household
· direct · ~0.92
Father
Francis Carroll
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Frances Carroll
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Carroll
Son · 1940 · age 23 · b. ~1917 · Illinois
★ You are viewing this record
Sibling
Mary Carroll
Sibling · 1940 · age 26
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 — Stephenson-County, Illinois
Open full size
1940 US Federal Census — Stephenson-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00892-00480)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Francis Linenfelser | 5 | Son | — | Illinois |
| 2 | Louise Kern | 77 | Lodger | — | Illinois |
| 3 | Rose Margaret Dorsey | 17 | Lodger | — | Illinois |
| 4 | Charles H. Mackler | 48 | Head | Fireman | Illinois |
| 5 | Lila Mackler | 47 | Wife | — | Illinois |
| 6 | Charles D. Mackler | 19 | Son | New Worker | Illinois |
| 7 | Frank P. Dunn | 57 | Head | Traveling Salesman | Illinois |
| 8 | Dorothy Dunn | 57 | Wife | — | Illinois |
| 9 | Elizabeth Shultz | 25 | Niece | Stenographer | Minnesota |
| 10 | Robert Shultz | 23 | Nephew | File Clerk | Minnesota |
| 11 | John O'Brien | 69 | Head | — | Illinois |
| 12 | Robert O'Brien | 67 | Brother | Trimmer | Illinois |
| 13 | Emma Welch | 62 | Servant | Housekeeper | Germany |
| 14 | John Curtin | 62 | Head | Conductor | Illinois |
| 15 | Helen Curtin | 61 | Wife | — | Illinois |
| 16 | Frank Mueller | 40 | Lodger | Chief Agent Clerk | Illinois |
| 17 | James L. Cotton | 42 | Head | Engineer | Illinois |
| 18 | Frances Cotton | 37 | Wife | Clerical | Minnesota |
| 19 | Loyna Balls | 65 | Head | — | Illinois |
| 20 | Louis Balls | 37 | Son | Proprietor | Illinois |
| 21 | Lorena Kapper | 34 | Daughter | Assembler | Illinois |
| 22 | Charlotte Kapper | 14 | Grand-daughter | — | Illinois |
| 23 | Fred H. Hinton | 68 | Head | Engineer | Illinois |
| 24 | Mamie Hinton | 51 | Wife | — | Illinois |
| 25 | James E. Lavelle | 78 | Head | — | Illinois |
| 26 | Anna Ross | 32 | Servant | Housekeeper | Illinois |
| 27 | Alvina Keim | 85 | Head | — | Illinois |
| 28 | Bessie Lou Keim | 55 | Daughter | Telegraph Operator | Illinois |
| 29 | Robert Keim | 47 | Son | Insurance Agent | Illinois |
| 30 | Evelyn Keim | 27 | Daughter-in-law | Visitor | Illinois |
| 31 | Gabriel H. Keim | 2 | Grand-son | — | Illinois |
| 32 | Blanche Long | 22 | Grand-daughter | Labeling | Illinois |
| 33 | Jean Maier | None | Lodger | — | Illinois |
| 34 | Francis Carroll | 51 | Head | — | Illinois |
| 35 | William Carroll THIS PERSON | 23 | Son | Claim Dept. | Illinois |
| 36 | Mary Frances Carroll | 26 | Daughter | — | Illinois |
| 37 | Delway W. Mackler | 41 | Head | Traffic Agent | Illinois |
| 38 | Melba Mackler | 38 | Wife | Saleslady | Illinois |
| 39 | Kenneth Gordon | 26 | Son-in-law | Cheese Cooker | Illinois |
| 40 | Virginia Gordon | 20 | Daughter | Clerical | Illinois |
Pedigree Summary
William + 1 sibling
Gen 1 · 3 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)