DM
Donald Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Knox-County, Missouri
Our Model Tree links this Donald Martin across the 1920, 1930 and 1940 US Censuses in Knox-County, Missouri (XGBoost, ~Confirmed), with identified parents Earl & Carl — first a son (b.~1915), then head of a 4-person household.
Age 25
b. ~1915
Male
Son
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Knox-County, Missouri |
| Surname | Martin |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Newark Town |
| 1935 Residence (County) | Knox |
| Additional Details | |
| Occupation | Mathematics Teacher |
| Industry | Public High School |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1035 |
| Highest Grade | C 4 |
| 1935 Residence | Same house |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Mathematics Teacher |
| Township / Ward | Newark 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Donald | Age | Birth yr |
|---|---|---|---|---|
| Stella Martin | Spouse | — | 48 | ~1892 |
| Donald Martin | Son | — | 25 | ~1915 |
| Lowell Martin | Son | — | 16 | ~1924 |
| Carl Martin | Head | — | 48 | ~1892 |
Census Appearances
1920
Knox, Missouri
Son, age 5
Knox, Missouri · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
Knox, Missouri
Son, age 15
Knox, Missouri · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Knox-County, Missouri
Son, age 25
Knox-County, Missouri · implied b. ~1915 — 4 household members
| Surname | Martin |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Newark Town |
| 1935 Residence (County) | Knox |
| Occupation | Mathematics Teacher |
| Industry | Public High School |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1035 |
| Highest Grade | C 4 |
| 1935 Residence | Same house |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Donald Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Earl Martin (~0.92 confidence) and father Carl Martin (~0.92 confidence) and father Guy Martin (~0.92 confidence) and mother Ruth Martin (~0.92 confidence) and mother Stella Martin (~0.92 confidence) and mother Stella Martin (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Earl Martin
b. ~1891
Source father
● Household
· direct · ~0.92
Father
Carl Martin
b. ~1892
Source father
● Household
· direct · ~0.92
Father
Guy Martin
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Ruth Martin
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Stella Martin
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Stella Martin
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Donald Martin
Son · 1940 · age 25 · b. ~1915 · Missouri
★ You are viewing this record
Sibling
Lowell Martin
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 — Knox-County, Missouri
Open full size
1940 US Federal Census — Knox-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02121-00107)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John H. French | 43 | Head | Farmer | Missouri |
| 2 | Eddie E. French | 34 | Wife | — | Missouri |
| 3 | James W. French | 35 | Head | Foreman | Missouri |
| 4 | Ruth French | 30 | Wife | — | Missouri |
| 5 | Mabel Keether | 68 | Head | — | Missouri |
| 6 | Elizabeth Morris | 101 | Mother | — | Missouri |
| 7 | Edmund J. Morris | 64 | Brother | — | Missouri |
| 8 | Mary Barnes | 22 | Servant | Housekeeper | Missouri |
| 9 | James Vansickle | 44 | Head | Farming | Missouri |
| 10 | Clara N. Vansickle | 35 | Wife | — | Missouri |
| 11 | James R. Vansickle | 14 | Son | — | Missouri |
| 12 | Georgia Richardson | 71 | Head | — | Missouri |
| 13 | Paul F. Gordinier | 62 | Head | Proprietor | Iowa |
| 14 | Lily D. Gordinier | 67 | Wife | — | Missouri |
| 15 | Robert N. Barnes | 69 | Head | Farm Helper | Missouri |
| 16 | Ora E. Barnes | 66 | Wife | — | Missouri |
| 17 | Seaman K. King | 60 | Head | Common Laborer | Missouri |
| 18 | Mary D. King | 46 | Wife | — | Missouri |
| 19 | John King | 23 | Son | Truck Driver | Wyoming |
| 20 | Otis H. Mauck | 42 | Head | Owner Operator | Missouri |
| 21 | Bessie Mauck | 38 | Wife | Saleslady | Missouri |
| 22 | Ted Mauck | 14 | Son | — | Missouri |
| 23 | Charles A. Shizendeker | 37 | Head | Lineman | Kansas |
| 24 | Hazel D. Shizendeker | 37 | Wife | Operator | Missouri |
| 25 | Shirley A. Shizendeker | 7 | Daughter | — | Missouri |
| 26 | Marilyn M. Shizendeker | 3 | Daughter | — | Missouri |
| 27 | Elizabeth Glover | 70 | Head | — | Missouri |
| 28 | Joseph L. Glover | 41 | Son | Common Laborer | Missouri |
| 29 | Carl R. Martin | 48 | Head | Mail Carrier | Missouri |
| 30 | Stella R. Martin | 48 | Wife | — | Missouri |
| 31 | Donald Martin THIS PERSON | 25 | Son | Mathematics Teacher | Missouri |
| 32 | Lowell A. Martin | 16 | Son | — | Missouri |
| 33 | Ralph P. Willey | 39 | Head | Owner Operator | Missouri |
| 34 | Gertrude Willey | 30 | Wife | — | Iowa |
| 35 | Mildred P. Willey | 6 | Daughter | — | Missouri |
| 36 | Mary Belle Willey | 4 | Daughter | — | Missouri |
| 37 | Carrie B. Willey | 1 | Daughter | — | Missouri |
| 38 | Alice L. Willey | 62 | Father | Attendant | Missouri |
| 39 | Lavina Willey | 60 | Mother | — | Missouri |
| 40 | Carl P. Miller | 44 | Head | Truck Driver | Missouri |
Related Census Records
Pedigree Summary
Donald + 1 sibling
Gen 1 · 6 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)