TM
Thomas Mcdermott — 1940 US Census Record
Model Tree available1940 United States Federal Census · Linn-County, Iowa
Our Model Tree links this Thomas Mcdermott across the 1920, 1930 and 1940 US Censuses in Linn-County, Iowa (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a son (b.~1920), then head of a 5-person household.
Age 20
b. ~1920
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Linn-County, Iowa |
| Surname | McDermott |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Cedar Rapids |
| 1935 Residence (County) | Linn |
| Additional Details | |
| Occupation | salesman |
| Industry | wholesale dry goods |
| Class of Worker | PW |
| Hours Worked | 13 |
| Income (1939) | 676 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Salesman |
| Township / Ward | Cedar Rapids |
| Est. Birth Year | ~1920 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Thomas Mcdermott | Son | — | 20 | ~1920 |
| Charles Hamor | Other | — | 21 | ~1919 |
| Ethel Hamor | Daughter | — | 17 | ~1923 |
| Ethel Mcdermott | Spouse | — | 44 | ~1896 |
| Thomas Mcdermott | Head | — | 52 | ~1888 |
Census Appearances
1920
Linn, Iowa
Son, age
Linn, Iowa · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | Thomas Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Linn, Iowa
Son, age 10
Linn, Iowa · implied b. ~1920 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | Thomas L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Linn-County, Iowa
Son, age 20
Linn-County, Iowa · implied b. ~1920 — 5 household members
| Surname | McDermott |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Cedar Rapids |
| 1935 Residence (County) | Linn |
| Occupation | salesman |
| Industry | wholesale dry goods |
| Class of Worker | PW |
| Hours Worked | 13 |
| Income (1939) | 676 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| 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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Mcdermott (~0.92 confidence) and father Thomas Mcdermott (~0.92 confidence) and mother Ethel Mcdermott (~0.92 confidence) and mother Ethel Mcdermott (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Mcdermott
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Thomas Mcdermott
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Ethel Mcdermott
b. ~1896
Source mother
● Household
· direct · ~0.92
Mother
Ethel Mcdermott
b. ~1896
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Mcdermott
Son · 1940 · age 20 · b. ~1920 · Iowa
★ You are viewing this record
Sibling
Ethel Hamor
Sibling · 1940 · age 17
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 — Linn-County, Iowa
Open full size
1940 US Federal Census — Linn-County, Iowa
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01177-00663)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Russell Shearer | 27 | Head | Laborer Dry Salt | Iowa |
| 2 | Esther Shearer | 22 | Wife | — | Iowa |
| 3 | Walter Shearer | 18 | Brother | New Worker | Iowa |
| 4 | John W. Blumenshine | 53 | Head | Foreman Fresh Pork | Illinois |
| 5 | Minnie Blumenshine | 48 | Wife | — | Missouri |
| 6 | Delbert Blumenshine | 19 | Son | — | Iowa |
| 7 | C. Flora Perrego | 73 | Head | — | Iowa |
| 8 | Charles Hill | 32 | Head | Packer | Iowa |
| 9 | Avis Hill | 30 | Wife | — | Iowa |
| 10 | Charles Hill | 10 | Son | — | Iowa |
| 11 | Doris Hill | 8 | Daughter | — | Iowa |
| 12 | Patricia Hill | 5 | Daughter | — | Iowa |
| 13 | Fred Heckel | 57 | Lodger | Sticker | Germany |
| 14 | Thomas Mcdermott | 52 | Head | Cab Driver | Iowa |
| 15 | Ethel Mcdermott | 44 | Wife | — | Iowa |
| 16 | Thomas Mcdermott THIS PERSON | 20 | Son | Salesman | Iowa |
| 17 | Charles Hamor | 21 | Son-in-law | Bell Hop | Iowa |
| 18 | Ethel Rebecca Hamor | 17 | Daughter | — | Iowa |
| 19 | Markes Mikesell | 44 | Head | Operator Stone Crusher | Missouri |
| 20 | Marie Mikesell | 36 | Wife | — | Iowa |
| 21 | George Mikesell | 19 | Son | — | Iowa |
| 22 | Leota Mikesell | 17 | Daughter | Typist | Iowa |
| 23 | Effie Mikesell | 16 | Daughter | — | Iowa |
| 24 | Loretta Mikesell | 6 | Daughter | — | Iowa |
| 25 | Gilbert B. Mason | 33 | Head | Salesman | Iowa |
| 26 | Mildred E. Mason | 32 | Wife | — | Illinois |
| 27 | Gilbert E. Mason | 10 | Son | — | Iowa |
| 28 | Betty Louese Mason | 10 | Daughter | — | Iowa |
| 29 | James Mute | 37 | Head | Carpenter | Iowa |
| 30 | Bessie Mute | 32 | Wife | — | Illinois |
| 31 | Dorothy Mute | 24 | Daughter | Book Binder | Iowa |
| 32 | Catherine Mute | 21 | Daughter | Waitress | Iowa |
| 33 | Harry Mute | 17 | Son | New Worker | Iowa |
| 34 | Vernie Johnson | 40 | Head | Sand Cutter | Iowa |
| 35 | Cleo Johnson | 28 | Wife | — | Iowa |
| 36 | Louis Melichar | 34 | Head | Proprietor | Iowa |
| 37 | Barbara Melichar | 30 | Wife | — | Illinois |
| 38 | Barbara Ann Melichar | 2 | Daughter | — | Iowa |
| 39 | Delores Melichar | 1 | Daughter | — | Iowa |
Pedigree Summary
Thomas + 1 sibling
Gen 1 · 4 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)