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John Mcnamara — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Mcnamara across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1869), then head of a 4-person household.
Age 71
b. ~1869
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | McNamara |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 71 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago - City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Steam Fitter |
| Industry | Heating Mfg. |
| Class of Worker | PW |
| Hours Worked | 4 |
| Income (1939) | 700 |
| Highest Grade | 3 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Steam Fitter |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1869 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Alice Mcnamara | Daughter | — | 43 | ~1897 |
| John Mcnamara | Head | — | 71 | ~1869 |
| John Mcnamara | Son | — | 25 | ~1915 |
| Amelia Mcnamara | Spouse | — | 67 | ~1873 |
Census Appearances
1920
Cook, Illinois
Other, age 51
Cook, Illinois · implied b. ~1869 — 25 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | John |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Switchman |
| Industry | Railroad |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Head, age 60
Cook, Illinois · implied b. ~1870 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 21 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Steam-fitter |
| Industry | Steam-plumbing |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 14,000 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 71
Cook-County, Illinois · implied b. ~1869 — 4 household members
| Surname | McNamara |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 71 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago - City |
| 1935 Residence (County) | Cook |
| Occupation | Steam Fitter |
| Industry | Heating Mfg. |
| Class of Worker | PW |
| Hours Worked | 4 |
| Income (1939) | 700 |
| Highest Grade | 3 |
| 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 John Mcnamara across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Mcnamara
Head · 1940 · age 71 · b. ~1869 · Illinois
★ You are viewing this record
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-t0627-00984-00499)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jeanette Stone | 14 | Daughter | — | Illinois |
| 42 | William Stone | 39 | Head | Inventory Clerk | Iowa |
| 43 | Helen Stone | 39 | Wife | — | Kansas |
| 44 | Marjorie Stone | 19 | Daughter | Salesgirl | Kansas |
| 45 | Donald Stone | 17 | Son | Gas Station Attendant | Kansas |
| 46 | Kenneth Stone | 14 | Son | — | Illinois |
| 47 | Robert Stone | 12 | Son | — | Illinois |
| 48 | Helen Stone | 10 | Daughter | — | Illinois |
| 49 | Joann Stone | 8 | Daughter | — | Illinois |
| 50 | Barbara Stone | 1 | Daughter | — | Illinois |
| 51 | John J. Mcnamara THIS PERSON | 71 | Head | Steam Fitter | Illinois |
| 52 | Amelia Mcnamara | 67 | Wife | — | Pennsylvania |
| 53 | Alice Mcnamara | 43 | Daughter | Telephone Operator | Illinois |
| 54 | John Mcnamara | 25 | Son | Accountant | Illinois |
| 55 | Joe Mulay | 49 | Head | Flower Mfg. | Italy |
| 56 | Margaret Mulay | 44 | Wife | — | Italy |
| 57 | Sam Mulay | 22 | Son | Maintenance Man | New Jersey |
| 58 | Pete Mulay | 18 | Son | — | New Jersey |
| 59 | Jess Mulay | 15 | Son | — | New Jersey |
| 60 | Frances Mulay | 7 | Daughter | — | New Jersey |
| 61 | Mary Mulay | 4 | Daughter | — | Illinois |
| 62 | Onofrio Tormasi | 55 | Head | Pan Greaser | Italy |
| 63 | Frances Tormasi | 49 | Wife | — | Italy |
| 64 | Vincent Tormasi | 17 | Son | Delivery Boy | Illinois |
| 65 | Lydia Tormasi | 14 | Daughter | — | Illinois |
| 66 | Edward Schlau | 24 | Head | Painter | Illinois |
| 67 | Ann Schlau | 25 | Wife | Beer | Illinois |
| 68 | Peter Fanas | 52 | Head | Salesman | Italy |
| 69 | Anna Fanas | 49 | Wife | — | Indiana |
| 70 | Vincent Vlach | 53 | Head | Laborer | Czechoslovakia |
| 71 | Annie Vlach | 52 | Wife | Maid | Czechoslovakia |
| 72 | Mary Vlach | 21 | Daughter | Dictaphone Operator | Illinois |
| 73 | Bessie Vlach | 20 | Daughter | Inspector | Illinois |
| 74 | Jerry Boccuzzi | 37 | Head | Truck Driver | Italy |
| 75 | Anna Boccuzzi | 35 | Wife | — | Italy |
| 76 | Victor Boccuzzi | 9 | Son | — | Illinois |
| 77 | Grace Pierro | 75 | Mother-in-law | — | Italy |
| 78 | John Smika | 25 | Head | Stationary Fireman | Illinois |
| 79 | Anna Smika | 47 | Mother | Janitress | Czechoslovakia |
| 80 | Edward Smika | 23 | Brother | Maintenance Man | 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)