JC
John Cassidy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this John Cassidy across the 1920, 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Ella & John — first a son (b.~1906), then head of a 2-person household.
Age 34
b. ~1906
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Cassidy |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Occupation | Owner manager |
| Industry | Gasoline station |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Owner Manager |
| Township / Ward | Lawrence City |
| Est. Birth Year | ~1906 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Ella Cassidy | Head | — | 71 | ~1869 |
| John Cassidy | Son | — | 34 | ~1906 |
Census Appearances
1920
Essex, Massachusetts
Son, age 12
Essex, Massachusetts · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | England |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Essex, Massachusetts
Son, age 23
Essex, Massachusetts · implied b. ~1907 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Claim Agent |
| Industry | Railway Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Son, age 34
Essex-County, Massachusetts · implied b. ~1906 — 2 household members
| Surname | Cassidy |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Occupation | Owner manager |
| Industry | Gasoline station |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| 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 John Cassidy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Ella Cassidy (~0.92 confidence) and father John Cassidy (~0.92 confidence) and mother Sarah Cassidy (~0.92 confidence) and mother Ella Cassidy (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Ella Cassidy
b. ~1869
Source mother
● Household
· direct · ~0.92
Father
John Cassidy
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Sarah Cassidy
b. ~1875
Source mother
● Household
· direct · ~0.92
Mother
Ella Cassidy
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Cassidy
Son · 1940 · age 34 · b. ~1906 · Massachusetts
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01583-00449)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Michele Hickley | 69 | Head | — | Massachusetts |
| 42 | Anne Hickley | 67 | Wife | — | Scotland |
| 43 | Mary Hickley | 32 | Daughter | — | Rhode Island |
| 44 | Frank R. Brown | 41 | Step-son | Laborer | Massachusetts |
| 45 | Elizabeth Howe | 64 | Head | Comber-English | Canada-English |
| 46 | Joseph P. Connelly | 31 | Lodger | — | Massachusetts |
| 47 | Edward F. R. Martin | 35 | Head | Porter-House | Vermont |
| 48 | Margaret M. Martin | 47 | Wife | Clerk-Adv. | Massachusetts |
| 49 | Margaret E. Powers | 12 | Step-daughter | — | Massachusetts |
| 50 | Antoinette Lamontagne | 62 | Head | Dressmaker | Lithuania |
| 51 | Elizabeth G. Dupuis | 62 | Head | — | Eire |
| 52 | Elinor Fortune | 22 | Daughter | — | Massachusetts |
| 53 | Olaf Garonsson | 53 | Head | Fireman | Norway |
| 54 | Delia Garonsson | 53 | Wife | — | Massachusetts |
| 55 | Ariel Garonsson | 14 | Son | — | Massachusetts |
| 56 | Irving Garonsson | 9 | Son | — | Massachusetts |
| 57 | Victor G. Campbell | 40 | Lodger | Spinner | Massachusetts |
| 58 | Jeremiah J. Dineen | 47 | Head | Shipper | Massachusetts |
| 59 | Catherine A. Dineen | 41 | Wife | — | Eire |
| 60 | Jeremiah Jr. Dineen | 8 | Son | — | Massachusetts |
| 61 | Catherine A. Dineen | 3 | Daughter | — | Massachusetts |
| 62 | Patricia I. Dineen | 2 | Daughter | — | Massachusetts |
| 63 | John Oraczka | 58 | Head | Laborer | Lithuania |
| 64 | Julia Oraczka | 49 | Wife | Drawer-French | Lithuania |
| 65 | Paul Oraczka | 24 | Son | Desk-Worker | Massachusetts |
| 66 | Albina Oraczka | 21 | Daughter | Cementer | Massachusetts |
| 67 | Elizabeth Budrevich | 53 | Head | — | Lithuania |
| 68 | Joseph Budrevich | 52 | Husband | Card-Tender | Lithuania |
| 69 | Blanche Budrevich | 25 | Daughter | Bookkeeper | Massachusetts |
| 70 | Joseph Jr. Budrevich | 16 | Son | — | Massachusetts |
| 71 | John Sugazaki | 56 | Head | Floor Hand | Poland |
| 72 | Victoria Sugazaki | 58 | Wife | — | Poland |
| 73 | Charles Sugazaki | 22 | Son | Sewer-Finish | Massachusetts |
| 74 | Mary Sugazaki | 30 | Daughter-in-law | Cap-Spinner | Rhode Island |
| 75 | Ella R. Cassidy | 71 | Head | — | Massachusetts |
| 76 | John J. Cassidy THIS PERSON | 34 | Son | Owner Manager | Massachusetts |
| 77 | Harriette Kelley | 65 | Head | — | Massachusetts |
| 78 | Albert E. Kelley | 69 | Husband | Second Hand | England |
| 79 | Edward F. Farrell | 51 | Head | Weaver | Canada-English |
| 80 | William E. Farrell | 23 | Son | Utility Boy | Massachusetts |
Pedigree Summary
John
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)