JM
James Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Wapello-County, Iowa
Our Model Tree links this James Martin across the 1920, 1930 and 1940 US Censuses in Wapello-County, Iowa (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a son (b.~1910), then head of a 4-person household.
Age 30
b. ~1910
Male
Son
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Wapello-County, Iowa |
| Surname | Martin |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Ottumwa City |
| 1935 Residence (County) | Wapello County |
| Additional Details | |
| Occupation | Tire repair |
| Industry | Tire repairing |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 496 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Tire Repair |
| Township / Ward | Ottumwa City |
| Est. Birth Year | ~1910 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Thomas Martin | Head | — | 63 | ~1877 |
| Robert Martin | Other | — | 7 | ~1933 |
| Crystal Martin | Other | — | 29 | ~1911 |
| James Martin | Son | — | 30 | ~1910 |
Census Appearances
1920
Wapello, Iowa
Son, age 10
Wapello, Iowa · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Wales |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Wapello, Iowa
Son, age 20
Wapello, Iowa · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Wales |
| Mother's Birthplace | Iowa |
| Occupation | Laborer |
| Industry | Tire Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Wapello-County, Iowa
Son, age 30
Wapello-County, Iowa · implied b. ~1910 — 4 household members
| Surname | Martin |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Ottumwa City |
| 1935 Residence (County) | Wapello County |
| Occupation | Tire repair |
| Industry | Tire repairing |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 496 |
| Highest Grade | H-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 James Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Martin (~0.92 confidence) and father Thomas Martin (~0.92 confidence) and mother Elizabeth Martin (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Martin
b. ~1877
Source father
● Household
· direct · ~0.92
Father
Thomas Martin
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Martin
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Martin
Son · 1940 · age 30 · b. ~1910 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Wapello-County, Iowa
Open full size
1940 US Federal Census — Wapello-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01209-00186)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Byron Smith | 20 | Son | Laborer | Iowa |
| 2 | Alberta Smith | 18 | Daughter | Housework | Iowa |
| 3 | Raymond Smith | 15 | Son | — | Iowa |
| 4 | Robert Smith | 13 | Son | — | Iowa |
| 5 | Donald Smith | 9 | Grand-son | — | Iowa |
| 6 | Leroy Wilkinson | 53 | Head | Foreman | Iowa |
| 7 | Mabel Wilkinson | 54 | Wife | — | Iowa |
| 8 | Marie Wilkinson | 16 | Daughter | — | Iowa |
| 9 | Vincent Wilkinson | 81 | Father | — | Iowa |
| 10 | Effie Wilkinson | 71 | Mother | — | Pennsylvania |
| 11 | David Richards | 39 | Head | Electrician | Iowa |
| 12 | Rubbie Richards | 38 | Wife | — | Iowa |
| 13 | Richard Richards | 19 | Son | Laborer | Iowa |
| 14 | Edward Richards | 16 | Son | — | Iowa |
| 15 | Lois Richards | 14 | Daughter | — | Iowa |
| 16 | Kenneth Richards | 8 | Son | — | Iowa |
| 17 | Robert Richards | 6 | Son | — | Iowa |
| 18 | Clarence Loy | 30 | Head | Janitor | Missouri |
| 19 | Clarabell Loy | 24 | Wife | Clerk | Iowa |
| 20 | John Ab. Loy | 65 | Father | — | Missouri |
| 21 | Edward Mckinsey | 44 | Head | Machinist | Iowa |
| 22 | Gladys Mckinsey | 37 | Wife | — | Iowa |
| 23 | Margaret Mckinsey | 19 | Daughter | Cashier | Iowa |
| 24 | Betty Mckinsey | 17 | Daughter | — | Iowa |
| 25 | Jean Mckinsey | 12 | Daughter | — | Iowa |
| 26 | Edward Mckinsey | 10 | Son | — | Iowa |
| 27 | Mary Mckinsey | 2 | Daughter | — | Iowa |
| 28 | Thomas D. Martin | 63 | Head | — | England |
| 29 | James Martin THIS PERSON | 30 | Son | Tire Repair | Iowa |
| 30 | Crystal Martin | 29 | Daughter-in-law | — | Iowa |
| 31 | Robert Martin | 7 | Grand-son | — | Iowa |
| 32 | Harry Reed | 47 | Head | Laborer | Iowa |
| 33 | Myrtle R. Reed | 42 | Wife | — | Missouri |
| 34 | Glenn Reed | 20 | Son | Laborer | Iowa |
| 35 | Dorothy Reed | 15 | Son | — | Iowa |
| 36 | Oliver Loy | 56 | Head | Laborer | Iowa |
| 37 | Rachel Loy | 47 | Wife | — | Iowa |
| 38 | William Loy | 21 | Son | Clerk | Iowa |
| 39 | James Loy | 18 | Son | New Worker | Iowa |
| 40 | Gladys Loy | 20 | Daughter | Waitress | Iowa |
Pedigree Summary
James
Gen 1 · 3 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)