JD
John Dugan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Bucks-County, Pennsylvania
Our Model Tree links this John Dugan across the 1930 and 1940 US Censuses in Bucks-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 8-person household.
Age 19
b. ~1921
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Bucks-County, Pennsylvania |
| Surname | Dugan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Bristol borough |
| 1935 Residence (County) | Bucks |
| Additional Details | |
| Occupation | New Worker |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | H 2 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | New Worker |
| Township / Ward | Bristol Borough |
| Est. Birth Year | ~1921 |
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 |
|---|---|---|---|---|
| Leonard Dugan | Son | — | 21 | ~1919 |
| Joseph Dugan | Son | — | 12 | ~1928 |
| James Dugan | Head | — | 57 | ~1883 |
| Eleanor Dugan | Daughter | — | 15 | ~1925 |
| Myrtle Dugan | Spouse | — | 51 | ~1889 |
| Grace Dugan | Daughter | — | 18 | ~1922 |
| Marion Dugan | Daughter | — | 24 | ~1916 |
| John Dugan | Son | — | 19 | ~1921 |
Census Appearances
1930
Bucks, Pennsylvania
Son, age 9
Bucks, Pennsylvania · implied b. ~1921 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dugan |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Bucks-County, Pennsylvania
Son, age 19
Bucks-County, Pennsylvania · implied b. ~1921 — 8 household members
| Surname | Dugan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Bristol borough |
| 1935 Residence (County) | Bucks |
| Occupation | New Worker |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | H 2 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Dugan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Dugan
Son · 1940 · age 19 · b. ~1921 · Pennsylvania
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Sibling
Joseph Dugan
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Dugan
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marion Dugan
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leonard Dugan
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Grace Dugan
Sibling · 1940 · age 18
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 — Bucks-County, Pennsylvania
Open full size
1940 US Federal Census — Bucks-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03444-00452)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Samuel Beatty | 12 | Son | — | Pennsylvania |
| 42 | Flossie Beatty | 9 | Daughter | — | Pennsylvania |
| 43 | Maxine Beatty | 7 | Daughter | — | Pennsylvania |
| 44 | Mary Beatty | 5 | Daughter | — | Pennsylvania |
| 45 | Isadora Beatty | 4 | Daughter | — | Pennsylvania |
| 46 | Percy Blaine | 52 | Head | Janitor | Maryland |
| 47 | Anna Blaine | 45 | Wife | — | Virginia |
| 48 | Percy Jr Blaine | 11 | Son | — | Pennsylvania |
| 49 | Elijah Bragg | 26 | Head | Laborer | Georgia |
| 50 | Salm Bragg | 20 | Daughter | — | Pennsylvania |
| 51 | Salm Bragg | 1 | Daughter | — | Pennsylvania |
| 52 | Mary Williams | 72 | Mother | — | Virginia |
| 53 | Ellen Mulligan | 56 | Head | — | Virginia |
| 54 | Edward Mulligan | 29 | Son | Laborer | Pennsylvania |
| 55 | Lawrence Mulligan | 26 | Son | Tax Investigator | Pennsylvania |
| 56 | Thomas Prior | 28 | Boarder | Salesman | New Jersey |
| 57 | Eleanor Prior | 22 | Daughter | Hairdresser | Pennsylvania |
| 58 | James Callahan | 66 | Head | Head Clerk | Pennsylvania |
| 59 | William Callahan | 63 | Brother | Plumber'S Helper | Pennsylvania |
| 60 | Catherine A. Callahan | 77 | Sister | — | Pennsylvania |
| 61 | Edward Gallagher | 57 | Brother | Retail Storekeeper | Pennsylvania |
| 62 | Isabel Gallagher | 59 | Sister | — | Pennsylvania |
| 63 | Anna Gallagher | 52 | Sister | Cook | Pennsylvania |
| 64 | Edward Mcguiness | 27 | Nephew | Painter | Pennsylvania |
| 65 | Philip Callahan | 76 | Head | Steam Driller | Pennsylvania |
| 66 | Bridget Callahan | 56 | Wife | — | Virginia |
| 67 | Philip Callahan | 21 | Son | Creeler | Pennsylvania |
| 68 | Harry Trimble | 56 | Head | Paper Maker | Pennsylvania |
| 69 | Daisy Trimble | 56 | Wife | — | Pennsylvania |
| 70 | James Dugan | 57 | Head | Acid Tender | Pennsylvania |
| 71 | Myrtle Dugan | 51 | Wife | — | Pennsylvania |
| 72 | Marion Dugan | 24 | Daughter | Factory Worker | Pennsylvania |
| 73 | John Dugan THIS PERSON | 19 | Son | New Worker | Pennsylvania |
| 74 | Eleanor Dugan | 15 | Daughter | — | Pennsylvania |
| 75 | Joseph Dugan | 12 | Son | — | Pennsylvania |
| 76 | Leonard Dugan | 21 | Son | Laborer | Pennsylvania |
| 77 | Grace Dugan | 18 | Daughter | Labeler | Pennsylvania |
| 78 | John Towns | 33 | Head | Laborer | Pennsylvania |
| 79 | Ruth Towns | 26 | Wife | Labeler | New Jersey |
| 80 | Hubert Towns | 9 | Son | — | Pennsylvania |
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)