MD
Mary Dugan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Dugan across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a daughter (b.~1908), then head of a 8-person household.
Age 32
b. ~1908
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Dugan |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | McKeesport City |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Mckeesport City |
| 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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Dugan | Daughter | — | 15 | ~1925 |
| Thomas Dugan | Son | — | 20 | ~1920 |
| Catherine Dugan | Daughter | — | 24 | ~1916 |
| Helen Dugan | Daughter | — | 28 | ~1912 |
| Anna Dugan | Spouse | — | 58 | ~1882 |
| Thomas Dugan | Head | — | 60 | ~1880 |
| John Dugan | Son | — | 17 | ~1923 |
| Mary Dugan | Daughter | — | 32 | ~1908 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age 11
Allegheny, Pennsylvania · implied b. ~1909 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dugan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 21
Allegheny, Pennsylvania · implied b. ~1909 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dugan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 32
Allegheny-County, Pennsylvania · implied b. ~1908 — 8 household members
| Surname | Dugan |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | McKeesport City |
| 1935 Residence (County) | Allegheny |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| 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 Mary Dugan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Dugan (~0.92 confidence) and father Thomas Dugan (~0.92 confidence) and mother Anna Dugan (~0.92 confidence) and mother Anna Dugan (~0.92 confidence) and mother Anna Dugan (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Dugan
b. ~1879
Source father
● Household
· direct · ~0.92
Father
Thomas Dugan
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Anna Dugan
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Anna Dugan
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Anna Dugan
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Dugan
Daughter · 1940 · age 32 · b. ~1908 · Pennsylvania
★ You are viewing this record
Sibling
Helen Dugan
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Dugan
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Dugan
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Dugan
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Dugan
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03409-00204)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James F Mellinger | 2 | son | — | Pennsylvania |
| 42 | John Kirk | 45 | head | Laborer | Pennsylvania |
| 43 | Loretta Kirk | 40 | wife | — | Pennsylvania |
| 44 | Mary E Kirk | 14 | daughter | — | Pennsylvania |
| 45 | John Kirk | 10 | son | — | Pennsylvania |
| 46 | Herman Fairbaugh | 38 | head | Foreman | Pennsylvania |
| 47 | Naomi A Fairbaugh | 37 | wife | — | Pennsylvania |
| 48 | Ruth Fairbaugh | 15 | daughter | — | Pennsylvania |
| 49 | Doris Fairbaugh | 13 | daughter | — | Pennsylvania |
| 50 | Betty Fairbaugh | 12 | daughter | — | Pennsylvania |
| 51 | Robert Fairbaugh | 7 | son | — | Pennsylvania |
| 52 | Ernest Orman | 61 | head | Laborer | Sweden |
| 53 | Cecilia A Orman | 56 | wife | — | Sweden |
| 54 | Charles M Parke | 44 | head | Teacher | Illinois |
| 55 | Alice Mae Parke | 30 | wife | — | Pennsylvania |
| 56 | Robert H Parke | 9 | son | — | Pennsylvania |
| 57 | Clara R Parke | 65 | mother | — | New Hampshire |
| 58 | Blank Blank | None | BLANK | Blank | BLANK |
| 59 | Charles J Stewart | 45 | head | Millwright | Scotland |
| 60 | Margaret A Stewart | 40 | wife | Sales Clerk | Scotland |
| 61 | James T Duncan | 63 | head | Plumber | Scotland |
| 62 | Isabelle C Duncan | 60 | wife | — | Scotland |
| 63 | Neil B Duncan | 29 | son | Metallurgist | Scotland |
| 64 | Isabelle Torrence | 18 | niece | Stenographer | Scotland |
| 65 | Fred Downs | 60 | head | Carpenter | Pennsylvania |
| 66 | Marjorie Downs | 51 | wife | — | Pennsylvania |
| 67 | Ernest Downs | 23 | son | Machinist | Maryland |
| 68 | Marian Downs | 22 | daughter | Stenographer | Maryland |
| 69 | Ivan Downs | 18 | son | — | Maryland |
| 70 | James A Mcsidey | 43 | head | Foreman | Hungary |
| 71 | Anna Mcsidey | 40 | wife | — | Hungary |
| 72 | Thomas M Dugan | 60 | head | Foreman | Pennsylvania |
| 73 | Anna Dugan | 58 | wife | — | Pennsylvania |
| 74 | Mary Dugan THIS PERSON | 32 | daughter | — | Pennsylvania |
| 75 | Helen Dugan | 28 | daughter | Clerk | Pennsylvania |
| 76 | Catherine Dugan | 24 | daughter | — | Pennsylvania |
| 77 | Thomas Dugan | 20 | son | Laborer | Pennsylvania |
| 78 | John Dugan | 17 | son | — | Pennsylvania |
| 79 | Elizabeth Dugan | 15 | daughter | — | Pennsylvania |
| 80 | Joseph H Bechtel | 40 | head | Laborer | Pennsylvania |
Pedigree Summary
Mary + 5 siblings
Gen 1 · 5 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)