TM
Thomas Mcdermott — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Dubuque-County, Iowa
Our Model Tree links this Thomas Mcdermott across the 1930 and 1940 US Censuses in Dubuque-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 10-person household.
Age 12
b. ~1928
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dubuque-County, Iowa |
| Surname | McDermott |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Dubuque |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Taylor Township |
| 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mcdermott | Spouse | — | 43 | ~1897 |
| Marlene Mcdermott | Daughter | — | 8 | ~1932 |
| Elaine Mcdermott | Daughter | — | 16 | ~1924 |
| Margaret Mcdermott | Daughter | — | 6 | ~1934 |
| Francis Mcdermott | Head | — | 46 | ~1894 |
| Gail Mcdermott | Son | — | 4 | ~1936 |
| Francis Mcdermott | Son | — | 19 | ~1921 |
| Jeanett Mcdermott | Daughter | — | 14 | ~1926 |
| Thomas Mcdermott | Son | — | 12 | ~1928 |
| Ramona Mcdermott | Daughter | — | 10 | ~1930 |
Census Appearances
1930
Dubuque, Iowa
Son, age 2
Dubuque, Iowa · implied b. ~1928 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | Thomas J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Dubuque-County, Iowa
Son, age 12
Dubuque-County, Iowa · implied b. ~1928 — 10 household members
| Surname | McDermott |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Dubuque |
| Highest Grade | No 6 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Mcdermott across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Thomas Mcdermott
Son · 1940 · age 12 · b. ~1928 · Iowa
★ You are viewing this record
Sibling
Gail Mcdermott
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marlene Mcdermott
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ramona Mcdermott
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jeanett Mcdermott
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mcdermott
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Mcdermott
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elaine Mcdermott
Sibling · 1940 · age 16
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 — Dubuque-County, Iowa
Open full size
1940 US Federal Census — Dubuque-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01159-00686)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Catherine Healy | 5 | Daughter | — | Iowa |
| 2 | Laurance Healy | 2 | Son | — | Iowa |
| 3 | Casper Konrardy | 57 | Head | Farming | Iowa |
| 4 | Mary Konrardy | 52 | Wife | — | Iowa |
| 5 | Delores Konrardy | 22 | Daughter | Domestic | Iowa |
| 6 | Cyril Konrardy | 20 | Son | Labor Farm | Iowa |
| 7 | Thelma Konrardy | 15 | Daughter | — | Iowa |
| 8 | Catherine Callahan | 78 | Head | — | Iowa |
| 9 | Robert Callahan | 35 | Son | Farming | Iowa |
| 10 | Leo Callahan | 44 | Son | Farming | Iowa |
| 11 | Frank Huber | 64 | Head | Farming | Iowa |
| 12 | Henry Huber | 65 | Brother | — | Iowa |
| 13 | Louis Huber | 51 | Brother | Farming | Iowa |
| 14 | Francis Muntner | 14 | Adopted Son | — | Iowa |
| 15 | Peter Berg | 65 | Head | Farming | Iowa |
| 16 | Anna Berg | 48 | Wife | — | Iowa |
| 17 | Raymond Berg | 23 | Son | — | Iowa |
| 18 | Francis Mcdermott | 46 | Head | Farming | Iowa |
| 19 | Margaret Mcdermott | 43 | Wife | — | Iowa |
| 20 | Francis Mcdermott | 19 | Son | Farm Labor | Iowa |
| 21 | Elaine Mcdermott | 16 | Daughter | — | Iowa |
| 22 | Jeanett Mcdermott | 14 | Daughter | — | Iowa |
| 23 | Thomas Mcdermott THIS PERSON | 12 | Son | — | Iowa |
| 24 | Ramona Mcdermott | 10 | Daughter | — | Iowa |
| 25 | Marlene Mcdermott | 8 | Daughter | — | Iowa |
| 26 | Margaret Mcdermott | 6 | Daughter | — | Iowa |
| 27 | Gail Mcdermott | 4 | Son | — | Iowa |
| 28 | Michael Urbain | 61 | Head | Farming | Iowa |
| 29 | Mary Urbain | 54 | Wife | — | Iowa |
| 30 | Raymond Urbain | 25 | Son | Labor Farm | Iowa |
| 31 | Otil Urbain | 19 | Daughter | Teacher | Iowa |
| 32 | Wilbert Urbain | 18 | Son | — | Iowa |
| 33 | John Jr Wall | 25 | Head | Farming | Iowa |
| 34 | Anna Wall | 22 | Wife | — | Iowa |
| 35 | Jean Ann Wall | 5 | Daughter | — | Iowa |
| 36 | Robert Wall | 4 | Son | — | Iowa |
| 37 | Rose Mary Wall | 3 | Daughter | — | Iowa |
| 38 | George Ranke | 47 | Lodger | — | Iowa |
| 39 | Edward Greenwood | 32 | Head | Farming | Iowa |
| 40 | Lorain Greenwood | 25 | Wife | — | Iowa |
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)