MC
Mary Costa — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Providence, Rhode Island
Our Model Tree links this Mary Costa across the 1920 and 1930 US Censuses in Providence, Rhode Island (XGBoost, ~Confirmed) — first a daughter (b.~1909), then head of a 10-person household.
Age 21
b. ~1909
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Providence, Rhode Island |
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Additional Details | |
| Occupation | Insulator |
| Industry | Braid Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Insulator |
| Township / Ward | East Providence Town |
| Est. Birth Year | ~1909 |
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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Agnes Costa | Daughter | — | 17 | ~1913 |
| Joseph Costa | Head | — | 41 | ~1889 |
| Hilda Costa | Daughter | — | 6 | ~1924 |
| Joseph Costa | Son | — | 16 | ~1914 |
| Mary Costa | Spouse | — | 36 | ~1894 |
| Alfred Costa | Son | — | 12 | ~1918 |
| Mary Costa | Daughter | — | 21 | ~1909 |
| Elvira Amaral | Other | — | 29 | ~1901 |
| Edward Amaral | Other | — | 4 | ~1926 |
| Manuel Costa | Son | — | 18 | ~1912 |
Census Appearances
1920
Providence, Rhode …
Daughter, age 10
Providence, Rhode Island · implied b. ~1910 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Portuguese |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Providence, Rhode …
Daughter, age 21
Providence, Rhode Island · implied b. ~1909 — 10 household members
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Occupation | Insulator |
| Industry | Braid Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Providence, Rhode Island, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Costa
Daughter · 1930 · age 21 · b. ~1909 · Rhode Island
★ You are viewing this record
Sibling
Hilda Costa
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfred Costa
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Manuel Costa
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Costa
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Costa
Sibling · 1930 · age 17
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 — Providence, Rhode Island
Open full size
1930 US Federal Census — Providence, Rhode Island
Page Contents
50 people indexed on this census page (ia:1930:15thcensus2172unit:0470)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Antonio S. Rocha | 39 | Head | Proprietor | Portugal |
| 2 | Mary E. Rocha | 29 | Wife | — | Portugal |
| 3 | Mary Mello | 50 | Head | — | Portugal |
| 4 | Anthony Mello | 22 | Son | Clerk | Rhode Island |
| 5 | Annie Mello | 20 | Daughter | Pillow Maker | Rhode Island |
| 6 | Joseph Mello | 18 | Son | Helper | Rhode Island |
| 7 | George Mello | 15 | Son | — | Rhode Island |
| 8 | Charles Mello | 13 | Son | — | Rhode Island |
| 9 | Felix A. St Louis | 52 | Head | Waiter | Canada |
| 10 | Emma St Louis | 46 | Wife | Servant | South Carolina |
| 11 | Manuel Joaquim | 53 | Head | Fireman | Portugal |
| 12 | Mary Joaquim | 44 | Wife | — | Portugal |
| 13 | Joseph Joaquim | 23 | Son | Laborer | Rhode Island |
| 14 | Anthony Joaquim | 21 | Son | Truck Driver | Rhode Island |
| 15 | Louise G. Joaquim | 19 | Daughter | Wire Roller | Rhode Island |
| 16 | John Joaquim | 18 | Son | Carpenter | Rhode Island |
| 17 | Mary Joaquim | 16 | Daughter | Stripper | Rhode Island |
| 18 | Charles Joaquim | 13 | Son | — | Rhode Island |
| 19 | Rose Joaquim | 10 | Daughter | — | Rhode Island |
| 20 | Manuel Jr. Joaquim | 7 | Son | — | Rhode Island |
| 21 | Emily G. Joaquim | 3 | Daughter | — | Rhode Island |
| 22 | Calisto M. Freitas | 34 | Head | Wire Drawer | Portugal |
| 23 | Meelan R. Freitas | 35 | Wife | — | Rhode Island |
| 24 | Alfred J. Freitas | 6 | Son | — | Rhode Island |
| 25 | Mary T. Rose | 65 | Mother | — | Portugal |
| 26 | Joseph Simmons | 67 | Head | Box Maker | Portugal |
| 27 | Rose Simmons | 38 | Daughter | — | Rhode Island |
| 28 | Manuel A. Ferreira | 36 | Head | Fitter | Portugal |
| 29 | Mary V. Ferreira | 29 | Wife | — | Portugal |
| 30 | August Ferreira | 10 | Son | — | Rhode Island |
| 31 | Raymond Ferreira | 7 | Son | — | Rhode Island |
| 32 | Joseph Perry | 38 | Head | Truck Driver | Portugal |
| 33 | Flora Perry | 35 | Wife | — | Massachusetts |
| 34 | Evelyn Perry | 14 | Daughter | — | Rhode Island |
| 35 | Earl Perry | 12 | Son | — | Rhode Island |
| 36 | Mary Perry | 10 | Daughter | — | Rhode Island |
| 37 | Joseph Jr. Perry | 9 | Son | — | Massachusetts |
| 38 | Joseph Costa | 41 | Head | Winder | Portugal |
| 39 | Mary Costa | 36 | Wife | — | Portugal |
| 40 | Mary Costa THIS PERSON | 21 | Daughter | Insulator | Massachusetts |
| 41 | Manuel Costa | 18 | Son | Quiller Operator | Massachusetts |
| 42 | Agnes Costa | 17 | Daughter | Winder | Massachusetts |
| 43 | Joseph Costa | 16 | Son | Messenger | Massachusetts |
| 44 | Alfred Costa | 12 | Son | — | Massachusetts |
| 45 | Hilda Costa | 6 | Daughter | — | Massachusetts |
| 46 | Elvira Amaral | 29 | Sister | Assorter | Portugal |
| 47 | Edward Amaral | 4 | Nephew | — | Rhode Island |
| 48 | Gaetano Sefo | 24 | Head | Wire Worker | Italy |
| 49 | Jennie Sefo | 20 | Wife | — | Rhode Island |
| 50 | Mary Sefo | 0 | Daughter | — | Rhode Island |
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)