MC
Mary Costa — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Merrimack-County, New Hampshire
Our Model Tree links this Mary Costa across the 1930 and 1940 US Censuses in Merrimack-County, New Hampshire (XGBoost, ~Confirmed) — first a spouse (b.~1885), then head of a 11-person household.
Age 55
b. ~1885
Female
Spouse
Born: Albania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Merrimack-County, New Hampshire |
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Albania |
| 1935 Residence (City) | Boscawen town |
| 1935 Residence (County) | Merrimack |
| Naturalization Status | Alien |
| Additional Details | |
| Highest Grade | No 0 |
| 1935 Residence | Same house |
| Birthplace (normalized) | albania |
| Township / Ward | Boscawen Town |
| Est. Birth Year | ~1885 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Costa | Spouse | — | 55 | ~1885 |
| Peter Costa | Head | — | 55 | ~1885 |
| Olga Costa | Daughter | — | 20 | ~1920 |
| James Costa | Son | — | 15 | ~1925 |
| Alexander Costa | Son | — | 23 | ~1917 |
| Cleopatra Costa | Daughter | — | 18 | ~1922 |
| Georgia Costa | Daughter | — | 10 | ~1930 |
| Michael Costa | Son | — | 8 | ~1932 |
| Paul Costa | Son | — | 12 | ~1928 |
| Aristotle Costa | Son | — | 17 | ~1923 |
| Cecile Costa | Daughter | — | 13 | ~1927 |
Census Appearances
1930
Merrimack, New …
Other, age 42
Merrimack, New Hampshire · implied b. ~1888 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Albania |
| Naturalization Status | Alien |
| Year of Immigration | 1911 |
| Age at First Marriage | 21 |
| Father's Birthplace | Albania |
| Mother's Birthplace | Albania |
| Can Read/Write | Yes |
| Mother Tongue | Albanian |
| Birthplace (normalized) | albania |
1940
Merrimack-County, New …
Spouse, age 55
Merrimack-County, New Hampshire · implied b. ~1885 — 11 household members
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Albania |
| 1935 Residence (City) | Boscawen town |
| 1935 Residence (County) | Merrimack |
| Naturalization Status | Alien |
| Highest Grade | No 0 |
| 1935 Residence | Same house |
| Birthplace (normalized) | albania |
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 Mary Costa across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Costa
Spouse · 1940 · age 55 · b. ~1885 · 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 — Merrimack-County, New Hampshire
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1940 US Federal Census — Merrimack-County, New Hampshire
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02293-00111)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph A. La Bonte | 8 | Son | — | New Hampshire |
| 2 | J. Edward Russell | 31 | Head | Chopper | New Hampshire |
| 3 | Ada B. Russell | 28 | Wife | Sander | New Hampshire |
| 4 | Richard E. Russell | 10 | Son | — | New Hampshire |
| 5 | Ida M. Donnelly | 55 | Housekeeper | Housekeeper | Massachusetts |
| 6 | Arthur W. Donnelly | 17 | Son of housekeeper | Laborer | Massachusetts |
| 7 | Robert E. Drought | 43 | Head | Carder | New Hampshire |
| 8 | Yvonne R. Drought | 22 | Daughter | — | New Hampshire |
| 9 | Marion A. Drought | 18 | Daughter | — | New Hampshire |
| 10 | Robert E. Drought | 11 | Son | — | New Hampshire |
| 11 | Jeremiah E. Gibbs | 68 | Head | Burning Brush | Massachusetts |
| 12 | Eva M. Gibbs | 47 | Wife | — | New Hampshire |
| 13 | Josephine M. Gibbs | 20 | Daughter | — | New Hampshire |
| 14 | William F. Gibbs | 17 | Son | — | New Hampshire |
| 15 | Georgie A. Sargent | 47 | Head | — | New Hampshire |
| 16 | Eugene Preve | 38 | Lodger | Paperhanger | Canada-French |
| 17 | Mary F. Drought | 75 | Mother | — | New Hampshire |
| 18 | Anson C. Alexander | 85 | Head | Physician | New Hampshire |
| 19 | Frances G. Alexander | 80 | Wife | — | Massachusetts |
| 20 | Marjorie G. Alexander | 54 | Daughter | Research Clerk | New Hampshire |
| 21 | Margaret F. Alexander | 18 | Grand-daughter | — | Massachusetts |
| 22 | Rachel O. Stevens | 46 | Housekeeper | Housekeeper | Iowa |
| 23 | Louis E. Rayno | 37 | Head | Foreman | New Hampshire |
| 24 | Jennie F. Rayno | 37 | Wife | — | New Hampshire |
| 25 | Paul L. Rayno | 13 | Son | — | New Hampshire |
| 26 | Walter T. Rayno | 12 | Son | — | New Hampshire |
| 27 | Mary L. Rayno | 4 | Daughter | — | New Hampshire |
| 28 | Peter J. Costa | 55 | Head | Weaver | Albania |
| 29 | Mary Costa THIS PERSON | 55 | Wife | — | Albania |
| 30 | Alexander Costa | 23 | Son | Stamper | New Hampshire |
| 31 | Olga Costa | 20 | Daughter | Stainer | New Hampshire |
| 32 | Cleopatra Costa | 18 | Daughter | — | New Hampshire |
| 33 | Aristotle Costa | 17 | Son | — | New Hampshire |
| 34 | James Costa | 15 | Son | — | New Hampshire |
| 35 | Cecile Costa | 13 | Daughter | — | New Hampshire |
| 36 | Paul Costa | 12 | Son | — | New Hampshire |
| 37 | Georgia Costa | 10 | Daughter | — | New Hampshire |
| 38 | Michael Costa | 8 | Son | — | New Hampshire |
| 39 | G. Victor Flint | 37 | Head | Proprietor | New Hampshire |
| 40 | Ruth B. Davis | 27 | Housekeeper | Housekeeper | Massachusetts |
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)