JC
John Clancy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Clancy across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1908), then head of a 8-person household.
Age 32
b. ~1908
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Clancy |
| Given Name | John C |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Floor Layer |
| Industry | Building |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 300 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Floor Layer |
| Township / Ward | Boston |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Clancy | Son | — | 32 | ~1908 |
| Patrick Clancy | Head | — | 61 | ~1879 |
| Henry Clancy | Son | — | 23 | ~1917 |
| Grace Clancy | Daughter | — | 30 | ~1910 |
| William Clancy | Son | — | 25 | ~1915 |
| Thomas Clancy | Son | — | 20 | ~1920 |
| Patricia Clancy | Daughter | — | 17 | ~1923 |
| Margaret Clancy | Daughter | — | 27 | ~1913 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 22
Suffolk, Massachusetts · implied b. ~1908 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clancy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | England |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 32
Suffolk-County, Massachusetts · implied b. ~1908 — 8 household members
| Surname | Clancy |
| Given Name | John C |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Floor Layer |
| Industry | Building |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 300 |
| Highest Grade | No 8 |
| 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 Clancy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Clancy
Son · 1940 · age 32 · b. ~1908 · Massachusetts
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Sibling
Margaret Clancy
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Clancy
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henry Clancy
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Clancy
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Grace Clancy
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Clancy
Sibling · 1940 · age 17
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
1940 US Federal Census — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01672-00116)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Alice Baroochin | 16 | Daughter | — | Massachusetts |
| 42 | Patrick J Waters | 75 | Head | — | Ireland |
| 43 | Nora B Waters | 62 | Wife | — | Ireland |
| 44 | Mary E Waters | 36 | Daughter | Cashier | Massachusetts |
| 45 | Annie M Waters | 34 | Daughter | Comptometer Op | Massachusetts |
| 46 | John J Waters | 32 | Son | Truck Driver | Massachusetts |
| 47 | Madeline Waters | 22 | Daughter | New Worker | Massachusetts |
| 48 | Patrick H Clancy | 61 | Head | Draw-Tender | Massachusetts |
| 49 | John C Clancy THIS PERSON | 32 | Son | Floor Layer | Massachusetts |
| 50 | Grace H Clancy | 30 | Daughter | Office Clerk | Massachusetts |
| 51 | Margaret G Clancy | 27 | Daughter | — | Massachusetts |
| 52 | William B Clancy | 25 | Son | Mechanic | Massachusetts |
| 53 | Henry W Clancy | 23 | Son | Packer | Massachusetts |
| 54 | Thomas F Clancy | 20 | Son | Timber-Man | Massachusetts |
| 55 | Patricia Clancy | 17 | Daughter | — | Massachusetts |
| 56 | Michael Holland | 83 | Head | — | Canada-Eng |
| 57 | Hannah D Holland | 65 | Wife | — | Ireland |
| 58 | Edward Holland | 33 | Son | Stock Clerk | Massachusetts |
| 59 | Gladys Holland | 28 | Daughter | Cashier | Massachusetts |
| 60 | Katherine Monahan | 50 | Cousin | Saleslady | Massachusetts |
| 61 | Mary Corcoran | 48 | Cousin | — | Massachusetts |
| 62 | John Connolly | 30 | Head | Manager | Ireland |
| 63 | Margaret Connolly | 30 | Wife | — | Ireland |
| 64 | John Connolly | 3 | Son | — | Massachusetts |
| 65 | Margaret Connolly | 2 | Daughter | — | Massachusetts |
| 66 | Daniel Connolly | 29 | Brother | Shipper | Ireland |
| 67 | Jacob Goldstein | 58 | Head | Tailor | Russia |
| 68 | Mary Goldstein | 58 | Wife | — | Russia |
| 69 | Minnie Lefshures | 24 | Daughter | — | Massachusetts |
| 70 | Alfred Lefshures | 25 | Son-in-law | Credit Man | Massachusetts |
| 71 | Frank M Flynn | 54 | Head | Electrician | Massachusetts |
| 72 | Esther C Flynn | 45 | Wife | — | Massachusetts |
| 73 | Frank M Jr Flynn | 20 | Son | Mover | Massachusetts |
| 74 | Eleanor L Flynn | 19 | Daughter | — | Massachusetts |
| 75 | Esther M Flynn | 16 | Daughter | — | Massachusetts |
| 76 | Paul R Flynn | 14 | Son | — | Massachusetts |
| 77 | Ellen E Terry | 78 | Head | — | Maine |
| 78 | Minnie G Landles | 60 | Daughter | — | Maine |
| 79 | William J Kelley | 61 | Head | Plumber | Massachusetts |
| 80 | Dorothy G Kelley | 32 | Daughter | New Worker | Massachusetts |
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)