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Barbara Martin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Luis-Obispo-County, California
Our Model Tree links this Barbara Martin across the 1930 and 1940 US Censuses in San-Luis-Obispo-County, California (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 9-person household.
Age 15
b. ~1925
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Luis-Obispo-County, California |
| Surname | MARTIN |
| Given Name | BARBARA |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Arroyo Grande Township |
| 1935 Residence (County) | San Luis Obispo |
| Additional Details | |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Arroyo Grande Township |
| Est. Birth Year | ~1925 |
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 Barbara | Age | Birth yr |
|---|---|---|---|---|
| Donald Martin | Son | — | 1 | ~1939 |
| Barbara Martin | Daughter | — | 15 | ~1925 |
| Reith Martin | Daughter | — | 14 | ~1926 |
| Frank Martin | Head | — | 43 | ~1897 |
| Belmeda Martin | Spouse | — | 36 | ~1904 |
| Kathleen Martin | Daughter | — | 1 | ~1939 |
| Yvonne Martin | Daughter | — | 3 | ~1937 |
| Dorothy Martin | Daughter | — | 10 | ~1930 |
| Kenith Martin | Son | — | 3 | ~1937 |
Census Appearances
1930
San Luis …
Daughter, age 5
San Luis Obispo, California · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Barbara |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Luis-Obispo-County, California
Daughter, age 15
San-Luis-Obispo-County, California · implied b. ~1925 — 9 household members
| Surname | MARTIN |
| Given Name | BARBARA |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Arroyo Grande Township |
| 1935 Residence (County) | San Luis Obispo |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Barbara Martin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Barbara Martin
Daughter · 1940 · age 15 · b. ~1925 · California
★ You are viewing this record
Sibling
Yvonne Martin
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kenith Martin
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Reith Martin
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Martin
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Martin
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Martin
Sibling · 1940 · age 1
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 — San-Luis-Obispo-County, California
Open full size
1940 US Federal Census — San-Luis-Obispo-County, California
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00328-00056)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Forrester | 63 | Head | Stone Mason | England |
| 2 | Alice Forrester | 62 | Wife | — | England |
| 3 | Anna Serres | 78 | Head | Farmer | California |
| 4 | Peter Serres | 42 | Son | — | California |
| 5 | Anna E. Eban | 63 | Head | Machinist | No Ireland |
| 6 | Thomas F. Eban | 43 | Son | — | California |
| 7 | Franz Roedi | 33 | Head | Steam Sh. | Germany |
| 8 | Olive Roedi | 28 | Wife | — | Michigan |
| 9 | Phyllis Roedi | 9 | Daughter | — | California |
| 10 | James Roedi | 4 | Son | — | California |
| 11 | Edward Freire | 47 | Head | Farmer | California |
| 12 | Alta Freire | 30 | Wife | — | Indiana |
| 13 | Mary Ann Freire | 10 | Daughter | — | Texas |
| 14 | Francis Freire | 8 | Son | — | Texas |
| 15 | Richard Freire | 4 | Son | — | California |
| 16 | James Freire | 2 | Son | — | California |
| 17 | Frank Martin | 43 | Head | Farmer | California |
| 18 | Belmeda Martin | 36 | Wife | — | California |
| 19 | Barbara Martin THIS PERSON | 15 | Daughter | — | California |
| 20 | Reith Martin | 14 | Daughter | — | California |
| 21 | Dorothy Martin | 10 | Daughter | — | California |
| 22 | Yvonne Martin | 3 | Daughter | — | California |
| 23 | Kathleen Martin | 1 | Daughter | — | California |
| 24 | Kenith Martin | 3 | Son | — | California |
| 25 | Donald Martin | 1 | Son | — | California |
| 26 | Joe D. Martin | 32 | Head | — | Portugal |
| 27 | Mary Martin | 18 | Wife | — | Portugal |
| 28 | Joe Carvalho | 39 | Head | Farmer | California |
| 29 | Mary Carvalho | 44 | Wife | — | California |
| 30 | Mary Carvalho | 15 | Daughter | — | California |
| 31 | Joe Carvalho | 13 | Son | — | California |
| 32 | Tony Carvalho | 12 | Son | — | California |
| 33 | Manuel Carvalho | 10 | Son | — | California |
| 34 | Eddie Carvalho | 9 | Son | — | California |
| 35 | Margaret Carvalho | 7 | Daughter | — | California |
| 36 | Charles Anderson | 56 | Head | Plasterer | Minnesota |
| 37 | Loella Anderson | 46 | Wife | — | Texas |
| 38 | John G. Vutken | 79 | Head | Farmer | Germany |
| 39 | Marion Vutken | 79 | Wife | — | Ohio |
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)