MC
Mary Cassidy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Peoria, Illinois
Our Model Tree links this Mary Cassidy across the 1920 and 1930 US Censuses in Peoria, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1908), then head of a 12-person household.
Age 22
b. ~1908
Female
Daughter
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Peoria, Illinois |
| Surname | Cassidy |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | England |
| Mother's Birthplace | Iowa |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Doctor Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Stenographer |
| Township / Ward | Peoria |
| Est. Birth Year | ~1908 |
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.
12 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Estella Cassidy | Daughter | — | 10 | ~1920 |
| Margaret Cassidy | Daughter | — | 19 | ~1911 |
| Mary Cassidy | Daughter | — | 22 | ~1908 |
| Agnes Cassidy | Daughter | — | 14 | ~1916 |
| Marion Cassidy | Daughter | — | 13 | ~1917 |
| Ann Cassidy | Daughter | — | 18 | ~1912 |
| John Cassidy | Head | — | 51 | ~1879 |
| Robert Cassidy | Son | — | 5 | ~1925 |
| James Cassidy | Son | — | 12 | ~1918 |
| Thomas Cassidy | Son | — | 8 | ~1922 |
| Richard Cassidy | Son | — | 2 | ~1928 |
| Mary Cassidy | Spouse | — | 41 | ~1889 |
Census Appearances
1920
Peoria, Illinois
Daughter, age 11
Peoria, Illinois · implied b. ~1909 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | England |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Peoria, Illinois
Daughter, age 22
Peoria, Illinois · implied b. ~1908 — 12 household members
| Surname | Cassidy |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | England |
| Mother's Birthplace | Iowa |
| Occupation | Stenographer |
| Industry | Doctor Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 2 US Census years (1920 and 1930) in Peoria, Illinois, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cassidy
Daughter · 1930 · age 22 · b. ~1908 · Illinois
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Sibling
Margaret Cassidy
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Cassidy
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Estella Cassidy
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Cassidy
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Cassidy
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Cassidy
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Cassidy
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marion Cassidy
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Cassidy
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 — Peoria, Illinois
Open full size
1930 US Federal Census — Peoria, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel547:0948)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ovetta Grider | 16 | Daughter | — | Kansas |
| 2 | Eleanor Grider | 9 | Daughter | — | Illinois |
| 3 | Ruth Grider | 6 | Daughter | — | Illinois |
| 4 | Geraldine Grider | 1 | Daughter | — | Illinois |
| 5 | Bonham Sefried | 30 | Head | Wire Weaver | Illinois |
| 6 | Madaline Sefried | 26 | Wife | — | Illinois |
| 7 | Josephine Sefried | 8 | Daughter | — | Illinois |
| 8 | James Sefried | 5 | Son | — | Illinois |
| 9 | John Pargetter | 42 | Head | Coal Miner | Illinois |
| 10 | Harry J. Ushio | 33 | Head | Welder | Syria |
| 11 | Sadie B. Ushio | 24 | Wife | — | South Dakota |
| 12 | Harriet B. Ushio | 1 | Daughter | — | Illinois |
| 13 | John E. Cassidy | 51 | Head | Machinist | England |
| 14 | Mary A. Cassidy | 41 | Wife | — | Iowa |
| 15 | Mary E. Cassidy THIS PERSON | 22 | Daughter | Stenographer | Illinois |
| 16 | Margaret J. Cassidy | 19 | Daughter | Sales Lady | Illinois |
| 17 | Ann T. Cassidy | 18 | Daughter | — | Illinois |
| 18 | Agnes G. Cassidy | 14 | Daughter | — | Illinois |
| 19 | Marion E. Cassidy | 13 | Daughter | — | Illinois |
| 20 | James E. Cassidy | 12 | Son | — | Illinois |
| 21 | Estella R. Cassidy | 10 | Daughter | — | Illinois |
| 22 | Thomas B. Cassidy | 8 | Son | — | Illinois |
| 23 | Robert A. Cassidy | 5 | Son | — | Illinois |
| 24 | Richard Cassidy | 2 | Son | — | Illinois |
| 25 | Geo J. Paquet | 49 | Head | Brick Layer | France |
| 26 | Gladys Paquet | 29 | Wife | — | Illinois |
| 27 | Theodore Pankey | 40 | Head | Laborer | Illinois |
| 28 | William Daniels | 56 | Brother | Section Hand | Iowa |
| 29 | Mary Mathews | 62 | House Keeper | Servant | Denmark |
| 30 | Henry H. Jones | 47 | Head | Pipe Fitter | Indiana |
| 31 | Francis V. Jones | 39 | Wife | — | Illinois |
| 32 | Ivan H. Jones | 25 | Son | Machine Operator | Illinois |
| 33 | George J. Jones | 18 | Son | — | Illinois |
| 34 | Harold L. Jones | 15 | Son | — | Illinois |
| 35 | Clara B. Jones | 12 | Daughter | — | Illinois |
| 36 | Arthur J. Snyder | 61 | Head | Sewerage Layer | Illinois |
| 37 | Maud V. Snyder | 49 | Wife | Janitress | Illinois |
| 38 | Gladys Snyder | 13 | Daughter | — | Illinois |
| 39 | Harry Snyder | 27 | Son | Father Helper | Illinois |
| 40 | John J. Yudat | 50 | Head | Butcher | Illinois |
| 41 | Lizzie M. Yudat | 46 | Wife | — | Illinois |
| 42 | Viola Yudat | 21 | Daughter | Glove Maker | Illinois |
| 43 | Louise Yudat | 19 | Daughter | Glove Maker | Illinois |
| 44 | Theodore Yudat | 17 | Son | — | Illinois |
| 45 | Ferdinand Yudat | 14 | Son | — | Illinois |
| 46 | Elmer Yudat | 11 | Son | — | Illinois |
| 47 | Margaret Yudat | 9 | Daughter | — | Illinois |
| 48 | Paul Yudat | 6 | Son | — | Illinois |
| 49 | Lorane Yudat | 4 | Daughter | — | Illinois |
| 50 | Richard Yudat | 2 | Son | — | Illinois |
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)