WC
William Cassidy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this William Cassidy across the 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1914), then head of a 6-person household.
Age 16
b. ~1914
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Cassidy |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Concord Town Part Of |
| Est. Birth Year | ~1914 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Richard Cassidy | Son | — | 5 | ~1925 |
| Alice Cassidy | Other | — | 30 | ~1900 |
| Thomas Cassidy | Head | — | 37 | ~1893 |
| Robert Cassidy | Son | — | 10 | ~1920 |
| William Cassidy | Son | — | 16 | ~1914 |
| Alice Cassidy | Daughter | — | 9 | ~1921 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 6
Middlesex, Massachusetts · implied b. ~1914 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| 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
Middlesex, Massachusetts
Son, age 16
Middlesex, Massachusetts · implied b. ~1914 — 6 household members
| Surname | Cassidy |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| 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 Middlesex, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
William Cassidy
Son · 1930 · age 16 · b. ~1914 · Massachusetts
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Sibling
Alice Cassidy
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Cassidy
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Cassidy
Sibling · 1930 · age 10
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 — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:15thcensuspopula917unit:0993)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Evelyn E. Lynch | 37 | Wife-H | — | New Hampshire |
| 52 | Robert O. Lynch | 15 | Son | — | Massachusetts |
| 53 | Priscilla M. Lynch | 13 | Daughter | — | Massachusetts |
| 54 | Dorothy M. Lynch | 6 | Daughter | — | Massachusetts |
| 55 | Beverly A. Lynch | 4 | Daughter | — | Massachusetts |
| 56 | Charles Anderson | 50 | Head | Proprietor | New Hampshire |
| 57 | Jennie Anderson | 48 | Wife-H | — | New Hampshire |
| 58 | Julia Anderson | 70 | Cousin | — | Norway |
| 59 | Elsie Chardley | 70 | Lodger | — | Massachusetts |
| 60 | Thomas A. Bush | 55 | Head | Watchman | England |
| 61 | Bridget Bush | 52 | Wife-H | — | Irish Free State |
| 62 | Mary A. Bush | 24 | Daughter | Clerk | Massachusetts |
| 63 | Susan Boylan | 58 | Head | — | Irish Free State |
| 64 | James Boylan | 53 | Brother | Teamster | Irish Free State |
| 65 | William Boylan | 50 | Brother | Handyman | Irish Free State |
| 66 | Thomas H. Boyd | 30 | Head | Proprietor | Massachusetts |
| 67 | Agnes M. Boyd | 70 | Mother | — | Irish Free State |
| 68 | James Dunn | 62 | Head | Laborer | Massachusetts |
| 69 | Martha J. Dunn | 57 | Wife-H | — | Massachusetts |
| 70 | Alice J. Dunn | 33 | Daughter | Solicitor | Massachusetts |
| 71 | Dorothy E. Dunn | 18 | Daughter | — | Massachusetts |
| 72 | Louis Viallet | 75 | Head | Proprietor | Belgium |
| 73 | Pauline Viallet | 60 | Wife-H | Helper | Belgium |
| 74 | James C. De Potter | 40 | Head | Manager | Belgium |
| 75 | Celesta M. De Potter | 37 | Wife-H | Grader | Belgium |
| 76 | Margaret M. De Potter | 15 | Daughter | — | Belgium |
| 77 | Eileen L. De Potter | 10 | Daughter | — | Belgium |
| 78 | Sofia De Costine | 69 | Head | — | Belgium |
| 79 | Alice De Costine | 30 | Daughter | — | Massachusetts |
| 80 | Thomas G. Cassidy | 37 | Head | Painter | Massachusetts |
| 81 | Alice J. Cassidy | 30 | Wife-H | Housework | Massachusetts |
| 82 | William H. Cassidy THIS PERSON | 16 | Son | — | Massachusetts |
| 83 | Robert L. Cassidy | 10 | Son | — | Massachusetts |
| 84 | Alice B. Cassidy | 9 | Daughter | — | Massachusetts |
| 85 | Richard L. Cassidy | 5 | Son | — | Massachusetts |
| 86 | James A. Kelley | 38 | Head-H | — | Massachusetts |
| 87 | Eva M. Kelley | 35 | Wife-H | Stitcher | Massachusetts |
| 88 | Elizabeth M. Cuddy | 45 | Sister | — | Massachusetts |
| 89 | Earl F. Cuddy | 19 | Nephew | Truck Driver | Massachusetts |
| 90 | Joseph Pelle | 40 | Head | Laborer | Italy |
| 91 | Rose Pelle | 38 | Wife-H | — | Italy |
| 92 | Annie Pelle | 18 | Daughter | — | Massachusetts |
| 93 | Mary Pelle | 15 | Daughter | — | Massachusetts |
| 94 | Paul Pelle | 11 | Son | — | Massachusetts |
| 95 | James Pelle | 35 | Head | Laborer | Italy |
| 96 | Antoinette Pelle | 30 | Wife-H | — | Italy |
| 97 | Rose Pelle | 13 | Daughter | — | Massachusetts |
| 98 | Annie Pelle | 11 | Daughter | — | Massachusetts |
| 99 | James Pelle | 10 | Son | — | Massachusetts |
| 100 | Frank Pelle | 8 | Son | — | 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)