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Margaret Mcdermott — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Margaret Mcdermott across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents John & John — first a spouse (b.~1916), then head of a 4-person household.
Age 24
b. ~1916
Female
Spouse
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | McDermott |
| Given Name | Margaret A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1916 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mcdermott | Spouse | — | 24 | ~1916 |
| James Mcdermott | Head | — | 34 | ~1906 |
| Jean Mcdermott | Daughter | — | 2 | ~1938 |
| George Mcdermott | Son | — | ~1940 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age 4
Allegheny, Pennsylvania · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 14
Allegheny, Pennsylvania · implied b. ~1916 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Spouse, age 24
Allegheny-County, Pennsylvania · implied b. ~1916 — 4 household members
| Surname | McDermott |
| Given Name | Margaret A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 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 Margaret Mcdermott across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Mcdermott (~0.92 confidence) and father John Mcdermott (~0.92 confidence) and mother Elizabeth Mcdermott (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Mcdermott
b. ~1878
Source father
● Household
· direct · ~0.92
Father
John Mcdermott
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Mcdermott
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Mcdermott
Spouse · 1940 · age 24 · b. ~1916 · Pennsylvania
★ You are viewing this record
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
38 people indexed on this census page (nara:1940:m-t0627-03663-00069)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Samuel H. Jr. Buller | 24 | Son | Mechanical Engineer | Pennsylvania |
| 42 | Emil L. Yeager | 46 | Head | Clerk - Shipping | Pennsylvania |
| 43 | Lillian S. Yeager | 44 | Wife | — | Pennsylvania |
| 44 | Nancy Yeager | 10 | Daughter | — | Pennsylvania |
| 45 | Godfrey F. Biell | 61 | Head | Clerk - Fiscal | Germany |
| 46 | Elnora S. Biell | 59 | Wife | — | Pennsylvania |
| 47 | John Costello | 50 | Head | Brakeman | Pennsylvania |
| 48 | Anna Costello | 41 | Wife | — | Pennsylvania |
| 49 | John, Jr. Costello | 6 | Son | — | Pennsylvania |
| 50 | Allen Squire | 26 | Son-in-law | Engineer | Pennsylvania |
| 51 | Lorraine Squire | 21 | Daughter | — | Pennsylvania |
| 52 | William D. Osborn | 35 | Head | Electrical Engineer | Indiana |
| 53 | Alice C. Osborn | 31 | Wife | — | Pennsylvania |
| 54 | Anna Osborn | 67 | Mother | — | Ohio |
| 55 | Ronald Osborn | 3 | Son | — | Pennsylvania |
| 56 | Sylvia Osborn | 4 | Daughter | — | Pennsylvania |
| 58 | John W. Bregman | 47 | Head | Construction Engineer | Pennsylvania |
| 59 | Helen A. Bregman | 44 | Wife | — | Pennsylvania |
| 60 | Joan Bregman | 3 | Daughter | — | Pennsylvania |
| 61 | James P. Mcdermott | 34 | Head | Salesman | Pennsylvania |
| 62 | Margaret A. Mcdermott THIS PERSON | 24 | Wife | — | Pennsylvania |
| 63 | Jean Cathleen Mcdermott | 2 | Daughter | — | Pennsylvania |
| 64 | George Mcdermott | 0 | Son | — | Pennsylvania |
| 65 | John G. Finnin | 55 | Head | Teller | Pennsylvania |
| 66 | Florence Finnin | 50 | Wife | — | Pennsylvania |
| 67 | John J. Finnin | 20 | Son | — | Pennsylvania |
| 68 | Mary Louise Finnin | 18 | Daughter | — | Pennsylvania |
| 69 | John Helginal | 56 | Head | Tool Maker | Pennsylvania |
| 70 | Olga Helginal | 55 | Wife | — | Sweden |
| 71 | Albert Helginal | 20 | Son | Apprentice Machinist | Pennsylvania |
| 73 | C. M. Rimbach | 43 | Head | Funeral Director | Pennsylvania |
| 74 | Veronica Rimbach | 34 | Wife | — | Pennsylvania |
| 75 | Veronica Rimbach | 12 | Daughter | — | Pennsylvania |
| 76 | Miriam Rimbach | 9 | Daughter | — | Pennsylvania |
| 77 | Clement Rimbach | 7 | Son | — | Pennsylvania |
| 78 | Lucille Rimbach | 4 | Daughter | — | Pennsylvania |
| 79 | Steven Mccarthy | 75 | Father-in-law | — | Pennsylvania |
| 80 | Stanley Pugiewicz | 50 | Head | Plumber | Poland |
Pedigree Summary
Margaret
Gen 1 · 3 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)