JM
John Martin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Merced-County, California
Our Model Tree links this John Martin across the 1910, 1920, 1930 and 1940 US Censuses in Merced-County, California (XGBoost, ~Confirmed) — first a head (b.~1889), then head of a 4-person household.
Age 51
b. ~1889
Male
Head
Born: Portugal
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Merced-County, California |
| Surname | Martin |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Portugal |
| 1935 Residence (City) | Judicial Township 4 |
| 1935 Residence (County) | Merced |
| Naturalization Status | Alien |
| Additional Details | |
| Occupation | Farmer |
| Class of Worker | OA |
| Hours Worked | 76 |
| Income (1939) | 0 |
| Highest Grade | No 0 |
| 1935 Residence | Same Place |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
| Occupation | Farmer |
| Township / Ward | Judicial Township 4 |
| Est. Birth Year | ~1889 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Patricia Martin | Daughter | — | 1 | ~1939 |
| Jackline Martin | Daughter | — | 7 | ~1933 |
| John Martin | Head | — | 51 | ~1889 |
| Marie Martin | Spouse | — | 45 | ~1895 |
Census Appearances
1910
Stanislaus, California
Other, age 20
Stanislaus, California · implied b. ~1890 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Johnie |
| Relationship to Head | Laborer |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Portugal |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
1920
Santa Clara, …
Other, age 30
Santa Clara, California · implied b. ~1890 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | John |
| Relationship to Head | Hired Man |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Portugal |
| Year of Immigration | 1905 |
| Naturalization Status | Alien |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
1930
Stanislaus, California
Other, age 40
Stanislaus, California · implied b. ~1890 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | John |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Portugal |
| Naturalization Status | Naturalized |
| Year of Immigration | 1909 |
| Age at First Marriage | 25 |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Occupation | Farm Laborer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | No |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
1940
Merced-County, California
Head, age 51
Merced-County, California · implied b. ~1889 — 4 household members
| Surname | Martin |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Portugal |
| 1935 Residence (City) | Judicial Township 4 |
| 1935 Residence (County) | Merced |
| Naturalization Status | Alien |
| Occupation | Farmer |
| Class of Worker | OA |
| Hours Worked | 76 |
| Income (1939) | 0 |
| Highest Grade | No 0 |
| 1935 Residence | Same Place |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
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 John Martin across 4 US Census years (1910, 1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Martin
Head · 1940 · age 51 · b. ~1889 · California
★ 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 — Merced-County, California
Open full size
1940 US Federal Census — Merced-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00265-00639)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Emil Jenson | 20 | Son | — | New York |
| 42 | Carla Jenson | 18 | Son | — | Calif |
| 43 | A. J. Mendonca | 62 | Head | Farmer | Portugal |
| 44 | Marie Mendonca | 62 | Wife | — | Portugal |
| 45 | Joe Mendonca | 28 | Son | Produce Buyer | Calif |
| 46 | David Mendonca | 26 | Son | Farmer | Calif |
| 47 | Fred Peckham | 72 | Head | Farmer | Calif |
| 48 | Jane Peckham | 67 | Wife | — | Calif |
| 49 | Albert Peckham | 41 | Son | Farmer | Calif |
| 50 | E. A. Marble | 70 | Head | Farmer | Calif |
| 51 | Dorothy Marble | 36 | Daughter | — | Calif |
| 52 | A. F. Rose | 50 | Head | Farmer | Portugal |
| 53 | Francis Rose | 42 | Wife | — | Calif |
| 54 | Albert Dutra | 22 | Nephew | Farm Labor | Calif |
| 55 | Raymond Rose | 23 | Son | Labor | Calif |
| 56 | Peter Rodrigues | 46 | Head | Farmer | Calif |
| 57 | Mary Rodrigues | 40 | Wife | — | Calif |
| 58 | Elmer Elmer | 22 | Head | Laborer Paper Route | Calif |
| 59 | Francis Elmer | 23 | Wife | — | Calif |
| 60 | John Martin THIS PERSON | 51 | Head | Farmer | Portugal |
| 61 | Marie Martin | 45 | Wife | — | Portugal |
| 62 | Jackline Martin | 7 | Daughter | — | Calif |
| 63 | Patricia Martin | 1 | Daughter | — | Calif |
| 64 | P. E. Martins | 31 | Head | — | Missouri |
| 65 | Margaret Martins | 25 | Wife | — | Oklahoma |
| 66 | Velma Martins | 5 | Daughter | — | Iowa |
| 67 | Ralph Martins | 4 | Son | — | Iowa |
| 68 | Leta Porter | 43 | Mother | — | Missouri |
| 69 | John Souza | 39 | Head | Farmer | Portugal |
| 70 | Palmira Souza | 29 | Wife | — | Calif |
| 71 | John Souza | 9 | Son | — | Calif |
| 72 | David Souza | 5 | Son | — | Calif |
| 73 | Marie Souza | 1 | Daughter | — | Calif |
| 74 | John D. Lamb | 54 | Head | Farmer | Kansas |
| 75 | Eva F. Lamb | 46 | Wife | — | Oklahoma |
| 76 | Willis Lamb | 16 | Son | — | Calif |
| 77 | Grace Lamb | 15 | Daughter | — | Calif |
| 78 | Patsy Lamb | 12 | Daughter | — | Calif |
| 79 | June Lamb | 9 | Daughter | — | Calif |
| 80 | Beverly Lamb | 8 | Daughter | — | Calif |
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)