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Bertha Martin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Coos-County, New Hampshire
Our Model Tree links this Bertha Martin across the 1930 and 1940 US Censuses in Coos-County, New Hampshire (XGBoost, ~Confirmed) — first a spouse (b.~1889), then head of a 9-person household.
Age 51
b. ~1889
Female
Spouse
Born: New Hampshire
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Coos-County, New Hampshire |
| Surname | Martin |
| Given Name | Bertha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Lancaster |
| 1935 Residence (County) | Coos |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
| Township / Ward | Lancaster |
| 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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Bertha | Age | Birth yr |
|---|---|---|---|---|
| Winston Martin | Son | — | 15 | ~1925 |
| Doris Martin | Daughter | — | 28 | ~1912 |
| Clarice Martin | Daughter | — | 12 | ~1928 |
| Peter Martin | Son | — | 17 | ~1923 |
| Stanley Martin | Son | — | 19 | ~1921 |
| Bertha Martin | Spouse | — | 51 | ~1889 |
| John Martin | Head | — | 56 | ~1884 |
| Cecile Martin | Daughter | — | 27 | ~1913 |
| Millard Martin | Son | — | 25 | ~1915 |
Census Appearances
1930
Coos, New …
Spouse, age 42
Coos, New Hampshire · implied b. ~1888 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Bertha M |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| Age at First Marriage | 21 |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | Vermont |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1940
Coos-County, New …
Spouse, age 51
Coos-County, New Hampshire · implied b. ~1889 — 9 household members
| Surname | Martin |
| Given Name | Bertha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Lancaster |
| 1935 Residence (County) | Coos |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
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 Bertha Martin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Bertha Martin
Spouse · 1940 · age 51 · b. ~1889 · New Hampshire
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Coos-County, New Hampshire
Open full size
1940 US Federal Census — Coos-County, New Hampshire
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-02285-00872)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Dorothy A. Gray | 29 | Wife | — | New Hampshire |
| 42 | Donald L. Gray | 2 | Son | — | New Hampshire |
| 43 | Daniel W. S. Pinkham | 67 | Head | Farmer | New Hampshire |
| 44 | Ida A. Pinkham | 63 | Wife | — | New Hampshire |
| 45 | William L. Pinkham | 30 | Son | Farmer | New Hampshire |
| 46 | Raymond Wheeler | 37 | Hired man | Hired Farmer | Vermont |
| 47 | Richard Ingalls | 34 | Head | Farmer | Maine |
| 48 | Helen D. Moulton | 57 | Housekeeper | Housekeeper | New Hampshire |
| 49 | Grace Davis | 25 | Housekeeper daughter | Waitress | New Hampshire |
| 50 | Grace Davis | 23 | Daughter | Waitress | New Hampshire |
| 51 | Charles Emerson | 38 | Head | Farmer | New Hampshire |
| 52 | Rosadala Emerson | 39 | Wife | — | Mass. |
| 53 | Arthur F. Emerson | 16 | Son | — | New Hampshire |
| 54 | Wilfred Aldrich | 57 | Hired man | Farmer | Canada-English |
| 55 | F. Kilburn Nourse | 34 | Head | Electrical Contractor | New Hampshire |
| 56 | Phyllis D. Nourse | 34 | Wife | — | New Hampshire |
| 57 | Christopher Sheridan | 74 | Head | Farmer | New Hampshire |
| 58 | Louise Sheridan | 50 | Wife | — | Maine |
| 60 | N. Jessie Cotton | 71 | Head | Farmer | New Hampshire |
| 61 | Carrie C. Cotton | 71 | Wife | — | New Hampshire |
| 63 | Eldridge W. Hall | 72 | Head | Farmer | New Hampshire |
| 64 | Theresa Hall | 59 | Wife | — | Mass. |
| 65 | Emerson Hall | 35 | Son | Farmer | New Hampshire |
| 66 | Earl Hall | 33 | Son | Farmer | New Hampshire |
| 67 | John F. Martin | 56 | Head | Farmer | Vermont |
| 68 | Bertha Martin THIS PERSON | 51 | Wife | — | New Hampshire |
| 69 | Doris C. Martin | 28 | Daughter | Teacher | New Hampshire |
| 70 | Cecile M. Martin | 27 | Daughter | Teacher | New Hampshire |
| 71 | Millard F. Martin | 25 | Son | Farmer | New Hampshire |
| 72 | Stanley S. Martin | 19 | Son | Farmer | New Hampshire |
| 73 | Peter R. Martin | 17 | Son | — | New Hampshire |
| 74 | Winston P. Martin | 15 | Son | — | New Hampshire |
| 75 | Clarice B. Martin | 12 | Daughter | — | New Hampshire |
| 77 | Ethel S. Matthews | 48 | Head | — | Canada-English |
| 78 | Vivian Matthews | 20 | Daughter | Bookkeeper | Canada-English |
| 79 | Keith Matthews | 17 | Son | Farmer | New Hampshire |
| 80 | Kathleen Matthews | 11 | Daughter | — | New Hampshire |
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)