MW
Mary Warner — 1940 US Census Record
Model Tree available1940 United States Federal Census · Winnebago-County, Illinois
Our Model Tree links this Mary Warner across the 1920, 1930 and 1940 US Censuses in Winnebago-County, Illinois (XGBoost, ~Confirmed), with identified parents Hilda — first a daughter (b.~1919), then head of a 3-person household.
Age 21
b. ~1919
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Winnebago-County, Illinois |
| Surname | Warner |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Rockford city |
| 1935 Residence (County) | Winnebago |
| Additional Details | |
| Occupation | Gen Office |
| Industry | Finance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 650 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Gen Office |
| Township / Ward | Rockford City |
| Est. Birth Year | ~1919 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Warner | Daughter | — | 21 | ~1919 |
| Hilda Warner | Head | — | 68 | ~1872 |
| Rudolph Warner | Son | — | 32 | ~1908 |
Census Appearances
1920
Winnebago, Illinois
Daughter, age 1
Winnebago, Illinois · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Warner |
| Given Name | Marylou E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Sweden |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Winnebago, Illinois
Daughter, age 12
Winnebago, Illinois · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Warner |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Winnebago-County, Illinois
Daughter, age 21
Winnebago-County, Illinois · implied b. ~1919 — 3 household members
| Surname | Warner |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Rockford city |
| 1935 Residence (County) | Winnebago |
| Occupation | Gen Office |
| Industry | Finance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 650 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Mary Warner across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Hilda Warner (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Hilda Warner
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Warner
Daughter · 1940 · age 21 · b. ~1919 · Illinois
★ You are viewing this record
Sibling
Rudolph Warner
Sibling · 1940 · age 32
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 — Winnebago-County, Illinois
Open full size
1940 US Federal Census — Winnebago-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00914-00334)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Fred Dornbush | 34 | Head | Tools Die Maker | Illinois |
| 2 | Bertha Dornbush | 34 | Wife | — | Illinois |
| 3 | Irving Dornbush | 4 | Son | — | Illinois |
| 4 | Hilda S. Hall | 55 | Head | Own Business | Illinois |
| 5 | Ralph Hall | 22 | Son | — | Illinois |
| 6 | Hans Hanson | 83 | Father | — | Norway |
| 7 | Hilda Warner | 68 | Head | — | Sweden |
| 8 | Rudolph Warner | 32 | Son | Meter Reader | Iowa |
| 9 | Mary Lou Warner THIS PERSON | 21 | Daughter | Gen Office | Iowa |
| 10 | Edward Cleveland | 31 | Head | — | Illinois |
| 11 | Walter Westbrook | 46 | Law | Claim Clerk | Illinois |
| 12 | Elsie Westbrook | 44 | Daughter | — | Illinois |
| 13 | Edward Westbrook | 14 | Son | — | Illinois |
| 14 | Donald A. Westbrook | 12 | Son | — | Illinois |
| 15 | Eugene L. Hall | 50 | Head | Salesman | Illinois |
| 16 | Helen Hall | 45 | Wife | — | Illinois |
| 17 | Nancy J. Hall | 17 | Daughter | — | Illinois |
| 18 | Alvin G. Gunther | 56 | Head | Dentist | Michigan |
| 19 | Freda Gunther | 46 | Wife | — | Illinois |
| 20 | Glenn Gunther | 19 | Son | Errand Boy | Illinois |
| 21 | Doris Gunther | 12 | Daughter | — | Illinois |
| 22 | J. E. Mceachran | 45 | Head | Carpenter | Illinois |
| 23 | Florence Mceachran | 42 | Wife | — | Illinois |
| 24 | Janet A. Mceachran | 12 | Daughter | — | Illinois |
| 25 | Percy Maitland | 49 | Head | Teacher | Wisconsin |
| 26 | Lyda Maitland | 58 | Wife | — | Wisconsin |
| 27 | Albert Jackson | 49 | Head | Clerk | Illinois |
| 28 | Maude Jackson | 46 | Wife | — | Illinois |
| 29 | Marjorie Guyett | 22 | Lodger | Music Supervisor | Wisconsin |
| 30 | William J. Nicholas | 43 | Head | Accountant | Pennsylvania |
| 31 | Ruby Nicholas | 42 | Wife | — | Illinois |
| 32 | Wilfrid A. Nicholas | 16 | Son | — | Illinois |
| 33 | Daniel J. Nicholas | 13 | Son | — | Illinois |
| 34 | Albert G. Nicholas | 9 | Son | — | Illinois |
| 35 | Folke Bengston | 42 | Head | Police Captain | Illinois |
| 36 | Mary Bengston | 41 | Wife | — | Iowa |
| 37 | Richard Blazer | 46 | Head | Own Business | Wisconsin |
| 38 | Hilda Blazer | 48 | Wife | — | Maryland |
| 39 | Cedric Blazer | 9 | Son | — | Illinois |
| 40 | Arthur Maitland | 54 | Head | Core Maker | Illinois |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 1 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)