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John Duggan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Duggan across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 8-person household.
Age 13
b. ~1927
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Duggan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1927 |
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 |
|---|---|---|---|---|
| Dennis Duggan | Son | — | 19 | ~1921 |
| Helen Duggan | Spouse | — | 42 | ~1898 |
| Anna Sullivan | Spouse | — | 56 | ~1884 |
| Joseph Duggan | Son | — | 12 | ~1928 |
| John Duggan | Son | — | 13 | ~1927 |
| Daniel Duggan | Head | — | 44 | ~1896 |
| Jeremiah Sullivan | Other | — | 60 | ~1880 |
| Helen Duggan | Daughter | — | 9 | ~1931 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 2
Suffolk, Massachusetts · implied b. ~1928 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Degan |
| Given Name | John M. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 13
Suffolk-County, Massachusetts · implied b. ~1927 — 8 household members
| Surname | Duggan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Highest Grade | No 7 |
| 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 Duggan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Duggan
Son · 1940 · age 13 · b. ~1927 · Massachusetts
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Sibling
Joseph Duggan
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dennis Duggan
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Duggan
Sibling · 1940 · age 9
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-t0627-01675-00046)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Riccardo Rosati | 41 | Head | Grocer | Italy |
| 2 | Sabina Rosati | 38 | Wife | — | Italy |
| 3 | Rocco Rosati | 16 | Son | News Worker | Massachusetts |
| 4 | Virginia Rosati | 15 | Daughter | — | Massachusetts |
| 5 | Pasquale Rosati | 12 | Son | — | Massachusetts |
| 6 | Frank Rosati | 5 | Son | — | Massachusetts |
| 7 | Nicholas Palangi | 27 | Head | Shipper | Massachusetts |
| 8 | Anna Palangi | 26 | Wife | — | Massachusetts |
| 9 | Anthony Palangi | 1 | Son | — | Massachusetts |
| 10 | Mary Concannon | 62 | Head | — | Ireland (Eire) |
| 11 | Martin Concannon | 37 | Son | Retail Salesman | Massachusetts |
| 12 | Leo Concannon | 31 | Son | Lawyer | Massachusetts |
| 13 | Paul Concannon | 28 | Son | Cable Splicer | Massachusetts |
| 14 | David Concannon | 25 | Son | — | Massachusetts |
| 15 | Mary J Coleman | 58 | Head | Seamstress | Massachusetts |
| 16 | Ethel P Moulton | 55 | Head | Com. Nurse | Massachusetts |
| 17 | Laura Moulton | 81 | Mother | — | New Hampshire |
| 18 | Helen Marden | 23 | Helper | Housekeeper | Massachusetts |
| 19 | Peter Galanis | 48 | Head | Bakery Prop | Greece |
| 20 | Katherine Galanis | 48 | Wife | — | Greece |
| 21 | Hamalitis Galanis | 21 | Step-son | Repair Man | Greece |
| 22 | Iulanie Galanis | 24 | Step-daughter | Salesgirl | Greece |
| 23 | Effie Galanis | 16 | Daughter | — | Massachusetts |
| 24 | William Galanis | 15 | Son | — | Massachusetts |
| 25 | Philip Villone | 75 | Head | — | Italy |
| 26 | Mary Villone | 72 | Wife | — | Italy |
| 27 | Daniel Duggan | 44 | Head | Police Officer | Ireland (Eire) |
| 28 | Helen Duggan | 42 | Wife | — | Ireland (Eire) |
| 29 | Dennis Duggan | 19 | Son | Stock Clerk | Massachusetts |
| 30 | John Duggan THIS PERSON | 13 | Son | — | Massachusetts |
| 31 | Joseph Duggan | 12 | Son | — | Massachusetts |
| 32 | Helen Duggan | 9 | Daughter | — | Massachusetts |
| 33 | Jeremiah Sullivan | 60 | Lodger | Retailer | Maine |
| 34 | Anna Sullivan | 56 | Wife | — | Maine |
| 35 | Agnes T Deane | 46 | Head | Clerk | Massachusetts |
| 36 | Helen C Deane | 44 | Sister | — | Massachusetts |
| 37 | Madeline A Deane | 42 | Sister | Clerk | Massachusetts |
| 38 | Irene G Deane | 40 | Sister | Clerk | Massachusetts |
| 39 | Ada A Cassell | 54 | Head | Proprietor | England |
| 40 | Louis Nichols | 50 | Lodger | Restaurant Tavern | Albania |
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)