TM
Thomas Mcnamara — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hamilton-County, Ohio
Our Model Tree links this Thomas Mcnamara across the 1930 and 1940 US Censuses in Hamilton-County, Ohio (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 9-person household.
Age 12
b. ~1928
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hamilton-County, Ohio |
| Surname | McNamara |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cincinnati |
| 1935 Residence (County) | Hamilton |
| Additional Details | |
| Highest Grade | 6 |
| 1935 Residence | Same Place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Cincinnati |
| Est. Birth Year | ~1928 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Michael Mcnamara | Son | — | 17 | ~1923 |
| Helen Mcnamara | Daughter | — | 9 | ~1931 |
| America Mcnamara | Spouse | — | 36 | ~1904 |
| Elizabeth Mcnamara | Daughter | — | 14 | ~1926 |
| Thomas Mcnamara | Son | — | 12 | ~1928 |
| William Mcnamara | Head | — | 43 | ~1897 |
| William Mcnamara | Son | — | 5 | ~1935 |
| Mary Mcnamara | Daughter | — | 18 | ~1922 |
| Joseph Mcnamara | Son | — | 11 | ~1929 |
Census Appearances
1930
Hamilton, Ohio
Son, age 1
Hamilton, Ohio · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | Thomas P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Kentucky |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Hamilton-County, Ohio
Son, age 12
Hamilton-County, Ohio · implied b. ~1928 — 9 household members
| Surname | McNamara |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cincinnati |
| 1935 Residence (County) | Hamilton |
| Highest Grade | 6 |
| 1935 Residence | Same Place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 12 · b. ~1928 · Ohio
★ You are viewing this record
Sibling
Michael Mcnamara
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mcnamara
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Mcnamara
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Mcnamara
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Mcnamara
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Mcnamara
Sibling · 1940 · age 5
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 — Hamilton-County, Ohio
Open full size
1940 US Federal Census — Hamilton-County, Ohio
Page Contents
21 people indexed on this census page (nara:1940:m-t0627-03189-00631)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Mcnamara | 43 | Head | Salesman | Pennsylvania |
| 42 | America Mcnamara | 36 | Wife | — | Kentucky |
| 43 | Mary Mcnamara | 18 | Daughter | Salesman | Ohio |
| 44 | Michael Mcnamara | 17 | Son | Record Boy | Ohio |
| 45 | Elizabeth Mcnamara | 14 | Daughter | — | Ohio |
| 46 | Thomas Mcnamara THIS PERSON | 12 | Son | — | Ohio |
| 47 | Joseph Mcnamara | 11 | Son | — | Ohio |
| 48 | Helen Mcnamara | 9 | Daughter | — | Ohio |
| 49 | William Jr Mcnamara | 5 | Son | — | Ohio |
| 50 | Thomas Ryan | 51 | Head | Laborer | Ohio |
| 51 | Margaret Ryan | 47 | Wife | — | Ohio |
| 52 | Albert H Ryan | 21 | Son | Laborer | Ohio |
| 53 | Tasa Trinhart | 39 | Head | Domestic | Ohio |
| 54 | Rosemary Trinhart | 17 | Daughter | — | Ohio |
| 55 | Margaret Trinhart | 16 | Daughter | — | Ohio |
| 56 | Helen Trinhart | 15 | Daughter | — | Ohio |
| 57 | Henry Ferguson | 67 | Head | — | Indiana |
| 58 | Laura Ferguson | 63 | Wife | — | West Virginia |
| 59 | Joseph Smith | 60 | Head | — | Kentucky |
| 60 | Betty Smith | 42 | Wife | — | Kentucky |
| 61 | Steve Pollac | 60 | Head | — | Kentucky |
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)