WC
William Cassidy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this William Cassidy across the 1920 and 1930 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1913), then head of a 7-person household.
Age 17
b. ~1913
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | Cassidy |
| Given Name | William P |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | Messenger |
| Industry | Post Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Messenger |
| Township / Ward | Chelsea City Pt Of |
| Est. Birth Year | ~1913 |
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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Cassidy | Head | — | 45 | ~1885 |
| Agnes Cassidy | Daughter | — | 19 | ~1911 |
| Agnes Cassidy | Spouse | — | 42 | ~1888 |
| William Cassidy | Son | — | 17 | ~1913 |
| Josephine Duryea | Other | — | 49 | ~1881 |
| Margaret Cassidy | Daughter | — | 16 | ~1914 |
| Alfred Cassidy | Son | — | 14 | ~1916 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 7
Suffolk, Massachusetts · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Son, age 17
Suffolk, Massachusetts · implied b. ~1913 — 7 household members
| Surname | Cassidy |
| Given Name | William P |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Messenger |
| Industry | Post Office |
| 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 William Cassidy across 2 US Census years (1920 and 1930) in Suffolk, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
William Cassidy
Son · 1930 · age 17 · b. ~1913 · Massachusetts
★ You are viewing this record
Sibling
Margaret Cassidy
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfred Cassidy
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Cassidy
Sibling · 1930 · age 19
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 — Suffolk, Massachusetts
Open full size
1930 US Federal Census — Suffolk, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel960:0436)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Fung Wong | 52 | Head | Laundry | China |
| 52 | Clarence R Ruddick | 27 | Head | Shoe Cutter | Maine |
| 53 | Louise Ruddick | 27 | Wife | None | Italy |
| 54 | Fred A Heaberlin | 44 | Head | Engineer | Kentucky |
| 55 | Marie B Heaberlin | 42 | Wife | None | Massachusetts |
| 56 | Allen F Heaberlin | 2 | Son | None | Massachusetts |
| 57 | Mary J Heaberlin | 13 | Daughter | None | Massachusetts |
| 58 | Jane A Ford | 67 | Head | None | Massachusetts |
| 59 | George W Ford | 66 | Brother | Assessor | Massachusetts |
| 60 | Elizabeth H Ford | 52 | Sister | Hair Dresser | Massachusetts |
| 61 | James T Ford | 50 | Brother | Photographer | Massachusetts |
| 62 | Isabelle J Cavanaugh | 21 | Niece | Teller | Massachusetts |
| 63 | George W Cavanaugh | 19 | Nephew | Bally Hopp | Massachusetts |
| 64 | Charles E Cavanaugh | 19 | Nephew | Chauffeur | Massachusetts |
| 65 | Frederick Cavanaugh | 17 | Nephew | None | Massachusetts |
| 66 | John J Mahoney | 61 | Head | Gold Gilder | Massachusetts |
| 67 | Margaret Mahoney | 58 | Wife | None | Massachusetts |
| 68 | Charles Lenton | 60 | Head | Foreman | Canada English |
| 69 | Josephine F Lenton | 53 | Wife | None | Massachusetts |
| 70 | Henry Keating | 78 | Head | Chair Maker | England |
| 71 | Mary A Keating | 43 | Daughter | Trained Nurse | England |
| 72 | Sara Jane Keating | 55 | Daughter | None | England |
| 73 | Edith M Keating | 51 | Daughter | Clerk | England |
| 74 | William Fitzgerald | 37 | Head | Proprietor | Massachusetts |
| 75 | William Fitzgerald | 41 | Brother | Pressman | Massachusetts |
| 76 | Gertrude Fitzgerald | 20 | Sister | Stenographer | Massachusetts |
| 77 | Thomas J Hennessey | 37 | Head | Janitor | Canada English |
| 78 | Josephine A Hennessey | 37 | Wife | None | Massachusetts |
| 79 | Timothy J Hennessey | 7 | Daughter | None | Massachusetts |
| 80 | Lawrence F Hennessey | 3 | Son | None | Massachusetts |
| 81 | Henry Hicks | 36 | Head | Salesman | Massachusetts |
| 82 | Catherine Hicks | 38 | Wife | None | Massachusetts |
| 83 | Mildred Hicks | 1 | Daughter | None | Massachusetts |
| 84 | Powers Malkin | 48 | Head | Salesman | Russia |
| 85 | Ida Malkin | 43 | Wife | None | Russia |
| 86 | Henry Malkin | 17 | Son | None | Massachusetts |
| 87 | Marion Malkin | 14 | Daughter | None | Massachusetts |
| 88 | Mathew Jones | 25 | Head | Work In | Massachusetts |
| 89 | Dorothy F Jones | 20 | Wife | None | Massachusetts |
| 90 | Robert F Jones | 1 | Son | None | Massachusetts |
| 91 | William Cassidy | 45 | Head | Sail Maker | Massachusetts |
| 92 | Agnes G Cassidy | 42 | Wife | None | Massachusetts |
| 93 | Agnes G Cassidy | 19 | Daughter | Stenographer | Massachusetts |
| 94 | William P Cassidy THIS PERSON | 17 | Son | Messenger | Massachusetts |
| 95 | Margaret M Cassidy | 16 | Daughter | None | Massachusetts |
| 96 | Alfred Cassidy | 14 | Son | None | Massachusetts |
| 97 | Josephine Duryea | 49 | Sister in law | Box Maker | Massachusetts |
| 98 | Henry Tremblay | 33 | Head | Cutter | Massachusetts |
| 99 | Eva Tremblay | 31 | Wife | None | New Hampshire |
| 100 | Dorothy Tremblay | 6 | Daughter | None | 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)