MC
Mary Costa — 1910 US Census Record
Linked across censuses1910 United States Federal Census · San Mateo, California
Our Model Tree links this Mary Costa across the 1900 and 1910 US Censuses in San Mateo, California (XGBoost, ~Confirmed) — first a spouse (b.~1879), then head of a 9-person household.
Age 31
b. ~1879
Female
Spouse
Born: Portugal
Married
1910 Census Record Details
| Census Year | 1910 |
| Location | San Mateo, California |
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Portugal |
| Years Married | 14 |
| Children Born | 9 |
| Children Living | 8 |
| Year of Immigration | 1898 |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Additional Details | |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
| Township / Ward | South San Francisco City |
| Est. Birth Year | ~1879 |
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 1910 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Harry Costa | Son | — | 12 | ~1898 |
| Mabel Costa | Daughter | — | 4 | ~1906 |
| Ramon Costa | Son | — | 8 | ~1902 |
| Mary Costa | Daughter | — | 14 | ~1896 |
| Agnes Costa | Daughter | — | 7 | ~1903 |
| Edward Costa | Son | — | 1 | ~1909 |
| Albert Costa | Son | — | 10 | ~1900 |
| Mary Costa | Spouse | — | 31 | ~1879 |
| Antone Costa | Head | — | 39 | ~1871 |
Census Appearances
1900
Contra Costa, …
Spouse, age 21
Contra Costa, California · implied b. ~1879 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Married |
| Birthplace | Portugal |
| Birth Month | Sept |
| Birth Year | 1879 |
| Year of Immigration | 1896 |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Occupation | Shoemaker |
| Can Read | Yes |
| Can Write | No |
| Speaks English | No |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
1910
San Mateo, …
Spouse, age 31
San Mateo, California · implied b. ~1879 — 9 household members
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Portugal |
| Years Married | 14 |
| Children Born | 9 |
| Children Living | 8 |
| Year of Immigration | 1898 |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| 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 Mary Costa across 2 US Census years (1900 and 1910) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Costa
Spouse · 1910 · age 31 · b. ~1879 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1910 US Federal Census — San Mateo, California
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1910 US Federal Census — San Mateo, California
Page Contents
50 people indexed on this census page (ia:1910:13thcensus1910po0104unit:0617)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Louis Bertram | 21 | Son | — | California |
| 52 | Gerardo Bertram | 4 | Son | — | California |
| 53 | Louis Negro | 37 | Head | Laborer | Italy |
| 54 | Theresa Negro | 37 | Wife | — | Italy |
| 55 | Margaret Negro | 9 | Daughter | — | Italy |
| 56 | Primo Martinelli | 46 | Head | Laborer | Italy |
| 57 | Elvira Martinelli | 34 | Wife | — | Italy |
| 58 | Marianna Martinelli | 6 | Daughter | — | California |
| 59 | Lucy Martinelli | 4 | Daughter | — | California |
| 60 | Frankie Martinelli | 2 | Son | — | California |
| 61 | Leo Martinelli | 5 | Son | — | California |
| 62 | Joe Martinelli | 12 | Son | — | Italy |
| 63 | John Martinelli | 8 | Son | — | California |
| 64 | Sverre Hanson | 39 | Head | Electrician | Sweden |
| 65 | May Hanson | 30 | Wife | — | Ireland |
| 66 | Antone Costa | 39 | Head | Fireman | Portugal |
| 67 | Mary Costa THIS PERSON | 31 | Wife | — | Portugal |
| 68 | Mary Costa | 14 | Daughter | — | California |
| 69 | Harry Costa | 12 | Son | — | California |
| 70 | Albert Costa | 10 | Son | — | California |
| 71 | Ramon Costa | 8 | Son | — | California |
| 72 | Agnes Costa | 7 | Daughter | — | California |
| 73 | Mabel Costa | 4 | Daughter | — | California |
| 74 | Edward Costa | 1 | Son | — | California |
| 75 | Antone Cambra | 24 | Head | Laborer | Portugal |
| 76 | Jessie Cambra | 26 | Wife | — | Portugal |
| 77 | Annie Cambra | 1 | Daughter | — | California |
| 78 | Antone Moring | 53 | Head | Retired | Portugal |
| 79 | Agatha Moring | 54 | Wife | — | Portugal |
| 80 | Jessie Moring | 20 | Daughter | Clerk | California |
| 81 | Alois Moring | 15 | Daughter | — | California |
| 82 | Joe Moring | 13 | Son | — | California |
| 83 | Lizzie Moring | 11 | Daughter | — | California |
| 84 | Frankie Moring | 7 | Son | — | California |
| 85 | Joe Lima | 55 | Head | Laborer | Portugal |
| 86 | Mary Lima | 50 | Wife | — | Portugal |
| 87 | Jack Lima | 13 | Son | — | California |
| 88 | John Sancha | 30 | Step-son | Laborer | Portugal |
| 89 | Frank Sancha | 34 | Step-son | Laborer | Portugal |
| 90 | John Fasoli | 35 | Head | Laborer | Portugal |
| 91 | Mary Fasoli | 25 | Wife | — | Portugal |
| 92 | Olivia Fasoli | 3 | Daughter | — | California |
| 93 | Mary Fasoli | 1 | Daughter | — | California |
| 94 | Manuel Fasoli | 14 | Son | — | California |
| 95 | Julia Fasoli | 10 | Daughter | — | California |
| 96 | Joseph Zuttano | 32 | Head | Laborer | Italy |
| 97 | Julia Zuttano | 31 | Wife | — | Italy |
| 98 | Feruchino Zuttano | 7 | Son | — | California |
| 99 | Agnes Zuttano | 7 | Boarder | — | California |
| 100 | Louis Zuttano | 7 | Boarder | — | California |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1910 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)