MN
Martha Nelson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Pima-County, Arizona
Our Model Tree links this Martha Nelson across the 1930 and 1940 US Censuses in Pima-County, Arizona (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 9-person household.
Age 16
b. ~1924
Female
Daughter
Born: Arizona
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Pima-County, Arizona |
| Surname | Nelson |
| Given Name | Martha Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Arizona |
| 1935 Residence (City) | Part of Supervisorial District #1 |
| 1935 Residence (County) | Pima |
| Additional Details | |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
| Township / Ward | Part Of Supervisorial District 1 |
| Est. Birth Year | ~1924 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Martha | Age | Birth yr |
|---|---|---|---|---|
| Thomas Nelson | Head | — | 48 | ~1892 |
| Olive Nelson | Daughter | — | 18 | ~1922 |
| Alice Nelson | Daughter | — | 7 | ~1933 |
| Omar Nelson | Son | — | 9 | ~1931 |
| Alice Nelson | Spouse | — | 43 | ~1897 |
| George Nelson | Son | — | 22 | ~1918 |
| Ruth Nelson | Daughter | — | 5 | ~1935 |
| Andrew Nelson | Son | — | 20 | ~1920 |
| Martha Nelson | Daughter | — | 16 | ~1924 |
Census Appearances
1930
Pima, Arizona
Daughter, age 6
Pima, Arizona · implied b. ~1924 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Martha E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Arizona |
| Father's Birthplace | Mexico |
| Mother's Birthplace | Utah |
| Occupation | none |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
1940
Pima-County, Arizona
Daughter, age 16
Pima-County, Arizona · implied b. ~1924 — 9 household members
| Surname | Nelson |
| Given Name | Martha Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Arizona |
| 1935 Residence (City) | Part of Supervisorial District #1 |
| 1935 Residence (County) | Pima |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
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 Martha Nelson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Martha Nelson
Daughter · 1940 · age 16 · b. ~1924 · Arizona
★ You are viewing this record
Sibling
Omar Nelson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Olive Nelson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Nelson
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Nelson
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Nelson
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Andrew Nelson
Sibling · 1940 · age 20
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 — Pima-County, Arizona
Open full size
1940 US Federal Census — Pima-County, Arizona
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00112-00017)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Richard M. Smith | 31 | Head | — | Ohio |
| 2 | Arthur L. Gresswein | 41 | Head | Laborer | New York |
| 3 | Mabel A. Gresswein | 35 | Wife | House Keeper | New York |
| 4 | Louis C. Bustamante | 48 | Head | Salesman | Arizona |
| 5 | Mary R. Bustamante | 44 | Wife | — | Arizona |
| 6 | Mary Pat Bustamante | 16 | Daughter | — | Arizona |
| 7 | Inais Bustamante | 14 | Daughter | — | Arizona |
| 8 | Louis C. Jr. Bustamante | 26 | Head | Photographer | Arizona |
| 9 | Carol S. Bustamante | 26 | Wife | — | Arizona |
| 10 | James Mark Balentine | 36 | Head | General Mechanic | Texas |
| 11 | Edith M. Balentine | 38 | Wife | — | Texas |
| 12 | Fieldon Balentine | 14 | Son | — | Texas |
| 13 | Darrell Balentine | 10 | Son | — | Texas |
| 14 | Ruby Balentine | 6 | Daughter | — | Texas |
| 15 | Janet Balentine | 3 | Daughter | — | Arizona |
| 16 | William E. Haworth | 41 | Head | Laborer | Missouri |
| 17 | Hazel Marie Haworth | 41 | Wife | House Work | Missouri |
| 18 | Benjamin Foy Starr | 49 | Head | Operator | Kansas |
| 19 | Anna Catharine Starr | 30 | Wife | — | Arizona |
| 20 | Benny Ray Starr | 8 | Son | — | Arizona |
| 21 | Bonnie Lee Starr | 7 | Daughter | — | Arizona |
| 22 | Caroline Belle Starr | 4 | Daughter | — | Arizona |
| 23 | Lewis Martin Myers | 67 | Head | Farm Hand | Illinois |
| 24 | Virgil Samuel Myers | 32 | Son | Farm Hand | Illinois |
| 25 | Myrtle Fay Buffkin | 40 | Head | Operator | Minnesota |
| 26 | Mervyn L. Pender | 38 | Head | Painter | Oklahoma |
| 27 | Irene R. Pender | 40 | Wife | — | Canada |
| 28 | Donald Pender | 13 | Son | — | California |
| 29 | James Pender | 11 | Son | — | California |
| 30 | Jack Pender | 9 | Son | — | California |
| 31 | Donna Lou Pender | 6 | Daughter | — | Arizona |
| 32 | Thomas Henry Nelson | 48 | Head | Operator | Mexico |
| 33 | Alice Kimball Nelson | 43 | Wife | — | Utah |
| 34 | George Kimball Nelson | 22 | Son | Laborer | Arizona |
| 35 | Andrew H. Nelson | 20 | Son | Laborer | Arizona |
| 36 | Olive A. Nelson | 18 | Daughter | Laborer | Arizona |
| 37 | Martha Grace Nelson THIS PERSON | 16 | Daughter | — | Arizona |
| 38 | Omar Dean Nelson | 9 | Son | — | Arizona |
| 39 | Alice Ann Nelson | 7 | Daughter | — | Arizona |
| 40 | Ruth Nelson | 5 | Daughter | — | Arizona |
Related Census Records
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)