ML
Mary Lewis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mcdonough-County, Illinois
Our Model Tree links this Mary Lewis across the 1920, 1930 and 1940 US Censuses in Mcdonough-County, Illinois (XGBoost, ~Confirmed), with identified parents Philip & Anna — first a daughter (b.~1918), then head of a 9-person household.
Age 22
b. ~1918
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mcdonough-County, Illinois |
| Surname | Lewis |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Emmet Twp |
| 1935 Residence (County) | McDonough |
| Additional Details | |
| Occupation | grade teacher |
| Industry | rural school |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 620 |
| Highest Grade | C 2 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Grade Teacher |
| Township / Ward | Emmet Twp |
| Est. Birth Year | ~1918 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Joanne Lewis | Daughter | — | 8 | ~1932 |
| Mary Lewis | Daughter | — | 22 | ~1918 |
| Helen Lewis | Daughter | — | 23 | ~1917 |
| Doris Lewis | Daughter | — | 20 | ~1920 |
| Philip Lewis | Head | — | 49 | ~1891 |
| Bernard Lewis | Son | — | 14 | ~1926 |
| John Lewis | Son | — | 16 | ~1924 |
| Edward Lewis | Son | — | 19 | ~1921 |
| Anna Lewis | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Mcdonough, Illinois
Daughter, age 2
Mcdonough, Illinois · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lewis |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Mcdonough, Illinois
Daughter, age 12
Mcdonough, Illinois · implied b. ~1918 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lewis |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Mcdonough-County, Illinois
Daughter, age 22
Mcdonough-County, Illinois · implied b. ~1918 — 9 household members
| Surname | Lewis |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Emmet Twp |
| 1935 Residence (County) | McDonough |
| Occupation | grade teacher |
| Industry | rural school |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 620 |
| Highest Grade | C 2 |
| 1935 Residence | Same house |
| 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 Mary Lewis across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Philip Lewis (~0.92 confidence) and mother Anna Lewis (~0.92 confidence) and mother Anna Lewis (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Philip Lewis
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Anna Lewis
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Anna Lewis
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Lewis
Daughter · 1940 · age 22 · b. ~1918 · Illinois
★ You are viewing this record
Sibling
Edward Lewis
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Lewis
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Lewis
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Lewis
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joanne Lewis
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Lewis
Sibling · 1940 · age 23
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 — Mcdonough-County, Illinois
Open full size
1940 US Federal Census — Mcdonough-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00839-00258)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles L. Keithley | 20 | son | Farm Laborer | Illinois |
| 2 | Earl D. Mcpeak | 29 | head | Common Laborer | Virginia |
| 3 | Rose Mcpeak | 28 | wife | — | Illinois |
| 4 | James Mcpeak | 8 | son | — | Illinois |
| 5 | Dorothy Mcpeak | 6 | daughter | — | Illinois |
| 6 | Donna K. Mcpeak | 2 | daughter | — | Illinois |
| 7 | Kenneth J. Mcpeak | 0 | son | — | Illinois |
| 8 | Matthew E. Hill | 54 | head | Farmer | Illinois |
| 9 | Grace Hill | 49 | wife | — | Illinois |
| 10 | Betty D. Hill | 21 | daughter | — | Illinois |
| 11 | George H. Murphy | 71 | head | Farmer | Illinois |
| 12 | Alta L. Murphy | 59 | wife | — | Illinois |
| 13 | Robert H. Murphy | 27 | son | Trucker | Illinois |
| 14 | Ethel L. Murphy | 32 | daughter | Clerk-Typing | Illinois |
| 15 | Herschel O. Keeling | 61 | head | Farm Laborer | Kentucky |
| 16 | Pearl M. Keeling | 53 | wife | — | Missouri |
| 17 | Samuel D. Noel | 48 | head | Farm Laborer | Kentucky |
| 18 | Opal D. Noel | 31 | wife | — | Illinois |
| 19 | Richard D. Noel | 14 | son | — | Illinois |
| 20 | Mary E. Noel | 12 | daughter | — | Illinois |
| 21 | Darlene J. Noel | 9 | daughter | — | Illinois |
| 22 | Betty M. Noel | 6 | daughter | — | Illinois |
| 23 | Beverly A. Noel | 1 | daughter | — | Illinois |
| 24 | Philip E. Lewis | 49 | head | Commissioner | Illinois |
| 25 | Anna Lewis | 50 | wife | — | Illinois |
| 26 | Helen Lewis | 23 | daughter | — | Illinois |
| 27 | Mary Lewis THIS PERSON | 22 | daughter | Grade Teacher | Illinois |
| 28 | Doris Lewis | 20 | daughter | Grade Teacher | Illinois |
| 29 | Edward Lewis | 19 | son | — | Illinois |
| 30 | John Lewis | 16 | son | — | Illinois |
| 31 | Bernard Lewis | 14 | son | — | Illinois |
| 32 | Joanne Lewis | 8 | daughter | — | Illinois |
| 33 | Carl R. Pratt | 25 | head | Pressman | Illinois |
| 34 | Martha L. Pratt | 25 | wife | Linotype Operator | Illinois |
| 35 | Carle R. Ii Pratt | 2 | son | — | Illinois |
| 36 | Merle L. Pratt | 0 | son | — | Illinois |
| 37 | Paul D. Lewis | 15 | brother-in-law | — | Illinois |
| 38 | Adrian B. Hughes | 40 | head | Farmer | New Jersey |
| 39 | Ethel Hughes | 37 | wife | — | Illinois |
| 40 | Olive Hughes | 16 | daughter | — | Illinois |
Related Census Records
Pedigree Summary
Mary + 6 siblings
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)