TM
Thomas Mcnamara — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Thomas Mcnamara across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 13-person household.
Age 17
b. ~1923
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | McNamara |
| Given Name | Thomas F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1923 |
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.
13 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Patrick Mcnamara | Son | — | 26 | ~1914 |
| Mary Mcnamara | Daughter | — | 22 | ~1918 |
| Thomas Mcnamara | Son | — | 17 | ~1923 |
| Joseph Mcnamara | Son | — | 19 | ~1921 |
| Theresa Mcnamara | Daughter | — | 14 | ~1926 |
| Dorothy Mcnamara | Daughter | — | 9 | ~1931 |
| John Joyce | Other | — | 52 | ~1888 |
| Robert Mcnamara | Son | — | 7 | ~1933 |
| John Mcnamara | Son | — | 23 | ~1917 |
| Edward Mcnamara | Son | — | 12 | ~1928 |
| Patrick Mcnamara | Head | — | 50 | ~1890 |
| Bridget Mcnamara | Spouse | — | 45 | ~1895 |
| Lawrence Mcnamara | Son | — | 13 | ~1927 |
Census Appearances
1930
Cook, Illinois
Son, age 7
Cook, Illinois · implied b. ~1923 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mc Namara |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 17
Cook-County, Illinois · implied b. ~1923 — 13 household members
| Surname | McNamara |
| Given Name | Thomas F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Illinois |
| 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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Thomas Mcnamara
Son · 1940 · age 17 · b. ~1923 · Illinois
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Sibling
Joseph Mcnamara
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Mcnamara
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Mcnamara
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Mcnamara
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mcnamara
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mcnamara
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mcnamara
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patrick Mcnamara
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Mcnamara
Sibling · 1940 · age 12
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01004-00092)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Louis Feifer | 35 | Head | Draftsman | Czechoslovakia |
| 2 | Mary K. Feifer | 32 | Wife | — | Illinois |
| 3 | Irene A. Feifer | 9 | Daughter | — | Illinois |
| 4 | Lois M. Feifer | 2 | Daughter | — | Illinois |
| 5 | Patrick J. Mcnamara | 50 | Head | Laborer | Irish Free State |
| 6 | Bridget Mcnamara | 45 | Wife | — | Irish Free State |
| 7 | Patrick Mcnamara | 26 | Son | Salvage Man | Illinois |
| 8 | John Mcnamara | 23 | Son | Plater And Buffer | Illinois |
| 9 | Mary J. Mcnamara | 22 | Daughter | File Clerk | Illinois |
| 10 | Joseph J. Mcnamara | 19 | Son | Cutter Binder | Illinois |
| 11 | Thomas F. Mcnamara THIS PERSON | 17 | Son | — | Illinois |
| 12 | Theresa Mcnamara | 14 | Daughter | — | Illinois |
| 13 | Lawrence Mcnamara | 13 | Son | — | Illinois |
| 14 | Edward Mcnamara | 12 | Son | — | Illinois |
| 15 | Dorothy Mcnamara | 9 | Daughter | — | Illinois |
| 16 | Robert Mcnamara | 7 | Son | — | Illinois |
| 17 | John Joyce | 52 | Lodger | — | Irish Free State |
| 18 | George Gleason | 53 | Head | Salesman | Kansas |
| 19 | Adelaide Gleason | 45 | Wife | — | Wisconsin |
| 20 | Georgette Gleason | 15 | Daughter | — | Wisconsin |
| 21 | Shirley L. Gleason | 13 | Daughter | — | Wisconsin |
| 22 | Yvonne Gleason | 11 | Daughter | — | Wisconsin |
| 23 | Sophia Dypczynski | 50 | Head | Button-Hole Maker | Poland |
| 24 | Gene J. Dypczynski | 25 | Son | Cabinet Maker | Wisconsin |
| 25 | Alice R. Dypczynski | 23 | Daughter | Stenographer | Illinois |
| 26 | Irene C. Dypczynski | 17 | Daughter | — | Illinois |
| 27 | Leonard G. Paul | 39 | Head | Accountant | Illinois |
| 28 | Rose V. Paul | 34 | Wife | — | Illinois |
| 29 | Louise Corti | 69 | Mother-in-law | — | Italy |
| 30 | John Dandur | 57 | Head | Laborer | Poland |
| 31 | Cecelia Dandur | 25 | Daughter | Folder | Washington |
| 32 | Alexander J. Dandur | 18 | Son | — | Illinois |
| 33 | Eleanor Dandur | 15 | Daughter | — | Illinois |
| 34 | Julius Kruger | 33 | Son-in-law | Machinist | Illinois |
| 35 | Sophie Kruger | 24 | Daughter | Binder Guide | Illinois |
| 36 | — | None | — | — | — |
| 37 | Yelena Kierlinkewicz | 73 | Head | — | Germany |
| 38 | Carl Serchuk | 43 | Head | Mattress Maker | Poland |
| 39 | Victoria Serchuk | 39 | Wife | — | Poland |
| 40 | Lillian M. Serchuk | 15 | Daughter | — | Illinois |
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)