MC
Mary Costa — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Plymouth, Massachusetts
Our Model Tree links this Mary Costa across the 1920 and 1930 US Censuses in Plymouth, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1903), then head of a 14-person household.
Age 27
b. ~1903
Female
Daughter
Born: Azores
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Plymouth, Massachusetts |
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Azores |
| Naturalization Status | Alien |
| Year of Immigration | 1902 |
| Father's Birthplace | Azores |
| Mother's Birthplace | Azores |
| Additional Details | |
| Occupation | Button Dept |
| Industry | Tack Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Birthplace (normalized) | azores |
| Occupation | Button Dept |
| Township / Ward | Mattapoisett |
| Est. Birth Year | ~1903 |
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.
14 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Manuel Costa | Son | — | 16 | ~1914 |
| Alice Costa | Daughter | — | 18 | ~1912 |
| Angeline Costa | Daughter | — | 14 | ~1916 |
| Margaret Costa | Daughter | — | 17 | ~1913 |
| Emily Costa | Daughter | — | 21 | ~1909 |
| Joseph Costa | Son | — | 8 | ~1922 |
| Matthew Costa | Son | — | 26 | ~1904 |
| Matthew Costa | Head | — | 51 | ~1879 |
| Anthony Costa | Son | — | 20 | ~1910 |
| Mary Costa | Daughter | — | 27 | ~1903 |
| John Costa | Son | — | 4 | ~1926 |
| Helen Costa | Daughter | — | 14 | ~1916 |
| Mary Costa | Spouse | — | 48 | ~1882 |
| Edward Costa | Son | — | 10 | ~1920 |
Census Appearances
1920
Bristol, Massachusetts
Daughter, age 17
Bristol, Massachusetts · implied b. ~1903 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Azores |
| Year of Immigration | 1906 |
| Naturalization Status | Alien |
| Father's Birthplace | Azores |
| Mother's Birthplace | Azores |
| Occupation | Speeders |
| Industry | Cotton mill |
| Class of Worker | W |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Birthplace (normalized) | azores |
1930
Plymouth, Massachusetts
Daughter, age 27
Plymouth, Massachusetts · implied b. ~1903 — 14 household members
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Azores |
| Naturalization Status | Alien |
| Year of Immigration | 1902 |
| Father's Birthplace | Azores |
| Mother's Birthplace | Azores |
| Occupation | Button Dept |
| Industry | Tack Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Birthplace (normalized) | azores |
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 (1920 and 1930) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Costa
Daughter · 1930 · age 27 · b. ~1903 · Massachusetts
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Sibling
Joseph Costa
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Manuel Costa
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Costa
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Costa
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anthony Costa
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Costa
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Matthew Costa
Sibling · 1930 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emily Costa
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Angeline Costa
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Costa
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Costa
Sibling · 1930 · age 14
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
1930 US Federal Census — Plymouth, Massachusetts
Open full size
1930 US Federal Census — Plymouth, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel940:0521)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Guy Amabres | 12 | Son | — | Massachusetts |
| 52 | Dorothy Amabres | 6 | Daughter | — | Massachusetts |
| 53 | George H Dunn | 60 | Head | Barber | Massachusetts |
| 54 | Emily A Dunn | 65 | Wife | — | Massachusetts |
| 55 | Albert Rowland | 44 | Boarder | Laborer | U.S. |
| 56 | Frank Lebaron | 48 | Head | Carpenter | Massachusetts |
| 57 | Bessie Lebaron | 34 | Wife | — | Massachusetts |
| 58 | Phyllis Lebaron | 13 | Daughter | — | Massachusetts |
| 59 | Arthur Pierce | 43 | Head | Printer | Massachusetts |
| 60 | Dorothy M Pierce | 41 | Wife | — | Massachusetts |
| 61 | Milton A Pierce | 20 | Son | Clerk | Massachusetts |
| 62 | Ernest Pierce | 11 | Son | — | Massachusetts |
| 63 | Lois Tinkham | 35 | Head | Mechanic | Massachusetts |
| 64 | Iona Tinkham | 29 | Wife | — | Massachusetts |
| 65 | Lois Jr Tinkham | 8 | Son | — | Massachusetts |
| 66 | Thelma Tinkham | 5 | Daughter | — | Massachusetts |
| 67 | Barbara Tinkham | 2 | Daughter | — | Massachusetts |
| 68 | Fred M Cathcart | 55 | Head | Engineer | Massachusetts |
| 69 | Mabel A Cathcart | 42 | Wife | — | Massachusetts |
| 70 | Frederick Cathcart | 26 | Son | Laborer | Massachusetts |
| 71 | Everett Cathcart | 24 | Son | Laborer | Massachusetts |
| 72 | Myrtle Cathcart | 15 | Daughter | — | Massachusetts |
| 73 | Charles Cathcart | 58 | Head | Engineer | Rhode Island |
| 74 | Alice Cathcart | 56 | Wife | — | Massachusetts |
| 75 | Robert C Cathcart | 17 | Son | — | Massachusetts |
| 76 | Joseph Mendes | 53 | Head | Laborer | Azores |
| 77 | Mary Mendes | 49 | Wife | — | Azores |
| 78 | Joseph Jr Mendes | 29 | Son | Chauffeur | Azores |
| 79 | Laura Mendes | 19 | Daughter | Button Dept | Massachusetts |
| 80 | Olive Mendes | 18 | Daughter | — | Massachusetts |
| 81 | Diolinda Mendes | 17 | Daughter | Button Dept | Massachusetts |
| 82 | Matthew Costa | 51 | Head | Laborer | Azores |
| 83 | Mary Costa | 48 | Wife | — | Azores |
| 84 | Matthew Jr Costa | 26 | Son | Laborer | Azores |
| 85 | Anthony Costa | 20 | Son | Laborer | Massachusetts |
| 86 | Manuel Costa | 16 | Son | Laborer | Massachusetts |
| 87 | Edward Costa | 10 | Son | — | Massachusetts |
| 88 | Joseph Costa | 8 | Son | — | Massachusetts |
| 89 | John Costa | 4 | Son | — | Massachusetts |
| 90 | Mary Costa THIS PERSON | 27 | Daughter | Button Dept | Azores |
| 91 | Emily Costa | 21 | Daughter | Button Dept | Massachusetts |
| 92 | Alice Costa | 18 | Daughter | Servant | Massachusetts |
| 93 | Margaret Costa | 17 | Daughter | Servant | Massachusetts |
| 94 | Angeline Costa | 14 | Daughter | — | Massachusetts |
| 95 | Helen Costa | 14 | Daughter | — | Massachusetts |
| 96 | Frank Pimmental | 62 | Head | Laborer | Azores |
| 97 | Teresa Pimmental | 52 | Wife | — | Azores |
| 98 | Tony Pimmental | 21 | Son | — | Massachusetts |
| 99 | Iona Pimmental | 15 | Daughter | — | Massachusetts |
| 100 | Helen Pimmental | 13 | Daughter | — | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)