MC
Mary Cassidy — 1900 US Census Record
Linked across censuses1900 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this Mary Cassidy across the 1900, 1910 and 1920 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1857), then head of a 9-person household.
Age 43
b. ~1857
Female
Head
Born: Ireland
Widowed
1900 Census Record Details
| Census Year | 1900 |
| Location | Philadelphia, Pennsylvania |
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Birth Month | Dec |
| Birth Year | 1857 |
| Year of Immigration | 1878 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Housekeeper |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Housekeeper |
| Est. Birth Year | ~1857 |
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 1900 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Agnes Cassidy | Daughter | — | 9 | ~1891 |
| Mary Cassidy | Daughter | — | 12 | ~1888 |
| Elizabeth Cassidy | Daughter | — | 19 | ~1881 |
| Delphine Cassidy | Daughter | — | 8 | ~1892 |
| Mary Cassidy | Head | — | 43 | ~1857 |
| Elizabeth Cassidy | Other | — | 45 | ~1855 |
| William Cassidy | Son | — | 13 | ~1887 |
| John Cassidy | Son | — | 15 | ~1885 |
| Mary Cassidy | Spouse | — | 23 | ~1877 |
Census Appearances
1900
Philadelphia, Pennsylvania
Head, age 43
Philadelphia, Pennsylvania · implied b. ~1857 — 9 household members
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Birth Month | Dec |
| Birth Year | 1857 |
| Year of Immigration | 1878 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Housekeeper |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Philadelphia, Pennsylvania
Spouse, age 58
Philadelphia, Pennsylvania · implied b. ~1852 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 38 |
| Children Born | 9 |
| Children Living | 6 |
| Year of Immigration | 1872 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Philadelphia, Pennsylvania
Other, age 68
Philadelphia, Pennsylvania · implied b. ~1852 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Mother |
| Sex | F |
| Color / Race | White |
| Age | 68 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1870 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth Country | Ireland |
| Year of Naturalization | 1885 |
| Birthplace (normalized) | ireland |
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 Cassidy across 3 US Census years (1900, 1910 and 1920) in Philadelphia, Pennsylvania, using XGBoost record linkage.
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This person
Anchor record
Mary Cassidy
Head · 1900 · age 43 · b. ~1857 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1900 US Federal Census — Philadelphia, Pennsylvania
Open full size
1900 US Federal Census — Philadelphia, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1900:12thcensusofpopu1480unit:0178)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Thomas Walker | 29 | Head | Day Laborer | Pennsylvania |
| 52 | Thomas Walker | 5 | Son | Day Laborer | Pennsylvania |
| 53 | Walter Walker | 3 | Son | Day Laborer | Pennsylvania |
| 54 | John Mccarty | 42 | Head | Day Laborer | Ireland |
| 55 | Catherine Mccarty | 44 | Wife | — | Pennsylvania |
| 56 | Mary Mccarty | 16 | Daughter | At School | Pennsylvania |
| 57 | Sadie Mccarty | 15 | Daughter | At School | Pennsylvania |
| 58 | John Mccarty | 13 | Son | At School | Pennsylvania |
| 59 | Christopher Cramer | 49 | Head | Cigar Packer | Germany |
| 60 | Annie Cramer | 42 | Wife | — | New York |
| 61 | Rosa Cramer | 23 | Daughter | Pocket Book Maker | Pennsylvania |
| 62 | Mollie Cramer | 17 | Daughter | Toy Maker Cutter | Pennsylvania |
| 63 | Thomas B. Cassidy | 28 | Head | Boiler Maker | Pennsylvania |
| 64 | Catherine Cassidy | 29 | Wife | — | Delaware |
| 65 | Lillian Cassidy | 3 | Daughter | — | Pennsylvania |
| 66 | M. Ed. Cassidy | 1 | Son | — | Pennsylvania |
| 67 | Owen Cassidy | 25 | Brother | Boiler Maker | Ireland |
| 68 | Mary Cassidy THIS PERSON | 42 | Head | Housekeeper | Ireland |
| 69 | Mary Cassidy | 22 | Wife | — | Ireland |
| 70 | Elizabeth Cassidy | 18 | Daughter | Day Work | Pennsylvania |
| 71 | John Cassidy | 14 | Son | Errand Boy | Pennsylvania |
| 72 | William Cassidy | 12 | Son | At School | Pennsylvania |
| 73 | Mary Cassidy | 11 | Daughter | At School | Pennsylvania |
| 74 | Agnes Cassidy | 8 | Daughter | At School | Pennsylvania |
| 75 | Delphine Cassidy | 7 | Daughter | At School | Pennsylvania |
| 76 | Elizabeth Cassidy | 45 | Sister | Vest Maker | Ireland |
| 77 | Mary Fish | 30 | Head | Dressmaker | Germany |
| 78 | Julia Fish | 6 | Daughter | — | Germany |
| 79 | Margaret Vogel | 55 | Head | Housekeeper | Germany |
| 80 | Mamie Vogel | 22 | Daughter | Button Hole | Maryland |
| 81 | Lizzie Vogel | 23 | Daughter | — | Virginia |
| 82 | Thomas Horn | 29 | Head | Bartender | Ireland |
| 83 | Mary Horn | 28 | Wife | — | Ireland |
| 84 | Joseph Horn | 4 | Son | — | Pennsylvania |
| 85 | W. Samuel Piper | 32 | Head | Cigar Dealer | Pennsylvania |
| 86 | Lillian Piper | 21 | Wife | — | Pennsylvania |
| 87 | John J. Gilderman | 48 | Head | Milk Dealer | Germany |
| 88 | Caroline Gilderman | 52 | Wife | — | Germany |
| 89 | Charles Gilderman | 22 | Son | Iron Worker | Pennsylvania |
| 90 | Herman Gilderman | 21 | Son | Paper Making Apprentice | Pennsylvania |
| 91 | Harry Gilderman | 12 | Son | At School | Pennsylvania |
| 92 | Annie Ellinger | 54 | Head | Housekeeper | New Jersey |
| 93 | Thomas Ellinger | 25 | Son | Stair Mounter | Pennsylvania |
| 94 | Margaret Ellinger | 23 | Daughter | — | Pennsylvania |
| 95 | Andrew Ellinger | 21 | Son | Foreman | Pennsylvania |
| 96 | William Ellinger | 18 | Son | Stair Mounter | Pennsylvania |
| 97 | Annie Conner | 7 | Adop. Dau | At School | Pennsylvania |
| 98 | John Paul | 37 | Head | Tailor | Germany |
| 99 | Minnie Paul | 34 | Wife | — | Germany |
| 100 | Helen Paul | 14 | Daughter | — | Germany |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1900 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)