TM
Thomas Mcdonald — 1940 US Census Record
Model Tree available1940 United States Federal Census · Appanoose-County, Iowa
Our Model Tree links this Thomas Mcdonald across the 1920, 1930 and 1940 US Censuses in Appanoose-County, Iowa (XGBoost, ~Confirmed), with identified parents Claire & Clary — first a son (b.~1915), then head of a 5-person household.
Age 25
b. ~1915
Male
Son
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Appanoose-County, Iowa |
| Surname | McDonald |
| Given Name | Thomas S |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Des Moines |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Teller |
| Industry | Natl Bank |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 52 |
| Highest Grade | C 4 |
| 1935 Residence | Iowa |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Teller |
| Township / Ward | Cincinnati Town |
| Est. Birth Year | ~1915 |
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 Mcdonald | Son | — | 25 | ~1915 |
| Robert Mcdonald | Son | — | 17 | ~1923 |
| Jean Mcdonald | Spouse | — | 47 | ~1893 |
| Fred Mcdonald | Son | — | 12 | ~1928 |
| Claire Mcdonald | Head | — | 47 | ~1893 |
Census Appearances
1920
Appanoose, Iowa
Son, age 5
Appanoose, Iowa · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Appanoose, Iowa
Son, age 15
Appanoose, Iowa · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Thomas S. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Missouri |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Appanoose-County, Iowa
Son, age 25
Appanoose-County, Iowa · implied b. ~1915 — 5 household members
| Surname | McDonald |
| Given Name | Thomas S |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Des Moines |
| 1935 Residence (County) | Polk |
| Occupation | Teller |
| Industry | Natl Bank |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 52 |
| Highest Grade | C 4 |
| 1935 Residence | Iowa |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 Mcdonald across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Claire Mcdonald (~0.92 confidence) and father Clary Mcdonald (~0.92 confidence) and mother Jean Mcdonald (~0.92 confidence) and father John Mcdonald (~0.92 confidence) and mother Jean Mcdonald (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Claire Mcdonald
b. ~1893
Source father
● Household
· direct · ~0.92
Father
Clary Mcdonald
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Jean Mcdonald
b. ~1893
Source mother
● Household
· direct · ~0.92
Father
John Mcdonald
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Jean Mcdonald
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Mcdonald
Son · 1940 · age 25 · b. ~1915 · Iowa
★ You are viewing this record
Sibling
Robert Mcdonald
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fred Mcdonald
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 — Appanoose-County, Iowa
Open full size
1940 US Federal Census — Appanoose-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01137-00487)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ida M Rice | 79 | Head | — | Missouri |
| 2 | Benjamin F Rice | 52 | Son | — | Iowa |
| 3 | Charles J Rice | 42 | Son | Pipe Fitter | Missouri |
| 4 | Lucy Vanblaricom | 70 | Head | Old Age Pension | Iowa |
| 5 | Joseph E Vanblaricom | 31 | Son | Laborer | Iowa |
| 6 | Rex Hall | 31 | Head | Truck Driver | Iowa |
| 7 | Lola O Hall | 31 | Wife | — | Missouri |
| 8 | Wilbur D Hall | 6 | Son | — | Iowa |
| 9 | Donald E Hall | 4 | Son | — | Iowa |
| 10 | Margaret J Hall | 3 | Daughter | — | Iowa |
| 11 | Charlotte E Hall | 1 | Daughter | — | Iowa |
| 12 | Sanford Buck | 70 | Head | Carpenter | Iowa |
| 13 | Leora A Buck | 71 | Wife | — | Illinois |
| 14 | William R Coulson | 71 | Head | Old Age Pension | Iowa |
| 15 | Lewis P Hoskin | 49 | Head | Soldiers Relief | Missouri |
| 16 | Maxine E Hoskin | 14 | Daughter | — | Iowa |
| 17 | Claire L Mcdonald | 47 | Head | Electrician | Iowa |
| 18 | Jean L Mcdonald | 47 | Wife | — | Missouri |
| 19 | Thomas S Mcdonald THIS PERSON | 25 | Son | Teller | Colorado |
| 20 | Robert L Mcdonald | 17 | Son | School Work | Iowa |
| 21 | Fred W Mcdonald | 12 | Son | — | Iowa |
| 22 | Addie M Buck | 80 | Head | Old Age | Iowa |
| 23 | John, Sarah A Buck | 84 | Sister | Old Age | Ohio |
| 24 | James L Harrington | 17 | Boarder | School Work | Iowa |
| 25 | Lewis L Crowder | 60 | Head | Miner | Iowa |
| 26 | Effie Crowder | 45 | Wife | — | Missouri |
| 27 | Leona R Crowder | 14 | Daughter | — | Iowa |
| 28 | Leo L Crowder | 10 | Son | — | Iowa |
| 29 | Paul E Crowder | 6 | Son | — | Iowa |
| 30 | Bessie Hill | 45 | Mother-in-law | — | Missouri |
| 31 | Emma Blevins | 58 | Head | — | Germany |
| 32 | Walter Hall | 58 | Head | Proprietor | Kansas |
| 33 | Agnes Hall | 53 | Wife | — | Iowa |
| 34 | Max L Hall | 17 | Son | — | Iowa |
| 35 | Shirley J Hall | 14 | Daughter | — | Iowa |
| 36 | Ross Panzeco | 59 | Head | Proprietor | Italy |
| 37 | Amelia E R Panzeco | 38 | Wife | — | Iowa |
| 38 | Wilhelmina Panzeco | 12 | Daughter | — | Iowa |
| 39 | Henry S Jaquiss | 69 | Head | Miner | Iowa |
| 40 | Rebecca Jaquiss | 68 | Wife | — | Iowa |
Pedigree Summary
Thomas + 2 siblings
Gen 1 · 5 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)