JC
John Clancy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this John Clancy across the 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1874), then head of a 7-person household.
Age 66
b. ~1874
Male
Head
Born: Irish Free State
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Clancy |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Lynn City |
| 1935 Residence (County) | Essex |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | moulder |
| Industry | Iron works |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 400 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birthplace (normalized) | irish free state |
| Occupation | Moulder |
| Township / Ward | Lynn City |
| Est. Birth Year | ~1874 |
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 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Thomas Clancy | Son | — | 31 | ~1909 |
| James Clancy | Son | — | 30 | ~1910 |
| Alice Clancy | Spouse | — | 66 | ~1874 |
| Edward Clancy | Son | — | 22 | ~1918 |
| Arthur Clancy | Son | — | 27 | ~1913 |
| Alice Clancy | Daughter | — | 34 | ~1906 |
| John Clancy | Head | — | 66 | ~1874 |
Census Appearances
1930
Middlesex, Massachusetts
Head, age 57
Middlesex, Massachusetts · implied b. ~1873 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clancy |
| Given Name | John F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| Naturalization Status | Naturalized |
| Year of Immigration | 1912 |
| Age at First Marriage | 29 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Meat Cutter |
| Industry | Grocery Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Radio Set | R |
| Birthplace (normalized) | irish free state |
1940
Essex-County, Massachusetts
Head, age 66
Essex-County, Massachusetts · implied b. ~1874 — 7 household members
| Surname | Clancy |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Lynn City |
| 1935 Residence (County) | Essex |
| Naturalization Status | Naturalized |
| Occupation | moulder |
| Industry | Iron works |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 400 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birthplace (normalized) | irish free state |
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.
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This person
Anchor record
John Clancy
Head · 1940 · age 66 · b. ~1874 · Massachusetts
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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-t0627-01697-00100)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Blanche B. Kerski | 45 | Head | — | Poland |
| 2 | Victor Kerski | 28 | Son | Mechanic Helper | Massachusetts |
| 3 | Gladis Kerski | 27 | Daughter | Worker | Massachusetts |
| 4 | Joseph Kerski | 25 | Son | Leather Worker | Massachusetts |
| 5 | Stanley Kerski | 23 | Son | Carpenter | Massachusetts |
| 6 | Helen Kerski | 21 | Daughter | Worker | Massachusetts |
| 7 | Edward Kerski | 16 | Son | — | Massachusetts |
| 8 | Charles H. Trenton | 61 | Head | Crane Operator | England |
| 9 | Mary E. Trenton | 62 | Wife | — | Maine |
| 10 | Doris Trenton | 24 | Daughter | Office Clerk | Massachusetts |
| 11 | Joseph Waladrowicz | 48 | Head | Insulator | Poland |
| 12 | Camelli Waladrowicz | 50 | Wife | — | Poland |
| 13 | Sabina Waladrowicz | 20 | Daughter | Radio Tube Worker | Massachusetts |
| 14 | Florence Waladrowicz | 18 | Daughter | — | Massachusetts |
| 15 | Ludger Petrowicz | 32 | Lodger | Leather Worker | Massachusetts |
| 16 | Thomas Omahonay | 64 | Head | Laborer | Irish Free State |
| 17 | Elizabeth Omahonay | 57 | Wife | — | Irish Free State |
| 18 | Margaret Curran | 58 | Sister-in-law | Stitcher | Irish Free State |
| 19 | Anthony Swierczewski | 32 | Head | Leather Worker | Poland |
| 20 | Helen Swierczewski | 32 | Wife | Machine Taper | Poland |
| 21 | Catherine Swierczewski | 53 | Mother | Leather Worker | Poland |
| 22 | John F. Clancy THIS PERSON | 66 | Head | Moulder | Irish Free State |
| 23 | Alice Clancy | 66 | Wife | — | Irish Free State |
| 24 | Alice Clancy | 34 | Daughter | Inspector | Massachusetts |
| 25 | Thomas Clancy | 31 | Son | Laborer | Massachusetts |
| 26 | James Clancy | 30 | Son | Restaurant Manager | Massachusetts |
| 27 | Arthur Clancy | 27 | Son | Watchman | Massachusetts |
| 28 | Edward Clancy | 22 | Son | New Worker | Massachusetts |
| 29 | John J. De Courcy | 45 | Head | Machine Operator | Irish Free State |
| 30 | Margaret De Courcy | 46 | Wife | — | Irish Free State |
| 31 | John De Courcy | 19 | Son | Good Baker | Massachusetts |
| 32 | James De Courcy | 16 | Son | — | Massachusetts |
| 33 | Thomas Lennon | 43 | Head | Mail Crier | Massachusetts |
| 34 | Ethel Lennon | 38 | Wife | Shoe Box Maker | Massachusetts |
| 35 | Ralph Lennon | 19 | Son | New Worker | Massachusetts |
| 36 | James Barlow | 33 | Head | Laborer | Massachusetts |
| 37 | Jennie Barlow | 33 | Wife | Laundress | Massachusetts |
| 38 | James L. Barlow | 6 | Son | — | Massachusetts |
| 39 | Arthur Barlow | 5 | Son | — | Massachusetts |
| 40 | Edward Barlow | 3 | Son | — | 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)