TM
Thomas Mcnamara — 1940 US Census Record
Model Tree available1940 United States Federal Census · Macon-County, Illinois
Our Model Tree links this Thomas Mcnamara across the 1920, 1930 and 1940 US Censuses in Macon-County, Illinois (XGBoost, ~Confirmed), with identified parents Joseph & Kattie — first a son (b.~1915), then head of a 4-person household.
Age 25
b. ~1915
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Macon-County, Illinois |
| Surname | McNamara |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Decatur City |
| 1935 Residence (County) | Macon |
| Additional Details | |
| Occupation | Lineman's Helper |
| Industry | Dept. Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 720 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Lineman'S Helper |
| Township / Ward | Decatur City |
| Est. Birth Year | ~1915 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mcnamara | Spouse | — | 62 | ~1878 |
| Thomas Mcnamara | Son | — | 25 | ~1915 |
| Joseph Mcnamara | Head | — | 63 | ~1877 |
| Norbert Mcnamara | Son | — | 20 | ~1920 |
Census Appearances
1920
Macon, Illinois
Son, age 4
Macon, Illinois · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | Thomas J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Macon, Illinois
Son, age 14
Macon, Illinois · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | Thomas |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| 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
Macon-County, Illinois
Son, age 25
Macon-County, Illinois · implied b. ~1915 — 4 household members
| Surname | McNamara |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Decatur City |
| 1935 Residence (County) | Macon |
| Occupation | Lineman's Helper |
| Industry | Dept. Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 720 |
| 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 Thomas Mcnamara across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joseph Mcnamara (~0.92 confidence) and mother Kattie Mcnamara (~0.92 confidence) and mother Margaret Mcnamara (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Mcnamara
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Kattie Mcnamara
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Margaret Mcnamara
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Mcnamara
Son · 1940 · age 25 · b. ~1915 · Illinois
★ You are viewing this record
Sibling
Norbert Mcnamara
Sibling · 1940 · age 20
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 — Macon-County, Illinois
Open full size
1940 US Federal Census — Macon-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00844-00191)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Carl E. Robb | 24 | Son | Mechanic | Illinois |
| 2 | Charity B. Robb | 21 | Daughter-in-law | Housekeeper | Illinois |
| 3 | Darlene Robb | 1 | Granddaughter | — | Illinois |
| 4 | Rudolph Godker | 65 | Head | — | Indiana |
| 5 | Thomas D. Thomas | 72 | Head | Engineer | England |
| 6 | Olive M. Thomas | 54 | Wife | Housekeeper | Illinois |
| 7 | Helen J. Thomas | 22 | Daughter | Waitress | Illinois |
| 8 | T. David Jr. Thomas | 18 | Son | Bill Clerk | Illinois |
| 9 | Laurence A. Thomas | 12 | Son | — | Illinois |
| 10 | Joe Clarence Thomas | 12 | Son | — | Illinois |
| 11 | Alice Janice Thomas | 8 | Daughter | — | Illinois |
| 12 | Cecil A. Lowder | 28 | Head | Operator | Illinois |
| 13 | Alice M. Lowder | 29 | Wife | Housekeeper | Illinois |
| 14 | Marilyn Lowder | 4 | Daughter | — | Illinois |
| 15 | Noah G. Burrow | 55 | Head | Machinist'S Helper | Illinois |
| 16 | Lizzie M. Burrow | 57 | Wife | Housekeeper | Iowa |
| 17 | Joseph P. Mcnamara | 63 | Head | Engineer | Illinois |
| 18 | Margaret E. Mcnamara | 62 | Wife | Housekeeper | Illinois |
| 19 | Thomas Mcnamara THIS PERSON | 25 | Son | Lineman'S Helper | Illinois |
| 20 | Norbert Mcnamara | 20 | Son | Apprentice | Illinois |
| 21 | L. A. Mclemore | 57 | Head | Painter & Paperhanger | Indiana |
| 22 | Anna Mclemore | 52 | Wife | Housekeeper | Indiana |
| 23 | Alden Mclemore | 25 | Son | Meat Cutter | Illinois |
| 24 | Kaye Mclemore | 20 | Daughter-in-law | Housekeeper | Illinois |
| 25 | Nancy Mclemore | 1 | Granddaughter | — | Illinois |
| 26 | Block 24 Begins And Block 20 Ends | None | — | — | — |
| 27 | Bernard D. Davis | 29 | Head | Salesman | Illinois |
| 28 | Nina M. Davis | 28 | Wife | Housekeeper | Illinois |
| 29 | Dolores Ann Davis | 6 | Daughter | — | Illinois |
| 30 | Sharon Lynn Davis | 2 | Daughter | — | Illinois |
| 31 | Edward J. O'Rourke | 68 | Head | Mechanic | Indiana |
| 32 | Catherine O'Rourke | 60 | Wife | Housekeeper | Illinois |
| 33 | Leo L. Milligan | 45 | Head | Sign Painter | Missouri |
| 34 | Edna Milligan | 43 | Wife | Housekeeper | Illinois |
| 35 | L. V. Porter | 43 | Head | Switchman | Illinois |
| 36 | Robert J. Wayne | 36 | Head | Salesman | Illinois |
| 37 | Lucile D. Wayne | 36 | Wife | Housekeeper | Illinois |
| 38 | Mary Ellen Wayne | 8 | Daughter | — | Illinois |
| 39 | Elmer E. Collins | 57 | Head | Laborer | Illinois |
| 40 | Ada B. Collins | 49 | Wife | Housekeeper | Illinois |
Pedigree Summary
Thomas + 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)