WM
William Mcdermott — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Allegheny, Pennsylvania
Our Model Tree links this William Mcdermott across the 1920 and 1930 US Censuses in Allegheny, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1914), then head of a 9-person household.
Age 16
b. ~1914
Male
Son
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Allegheny, Pennsylvania |
| Surname | McDermott |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1914 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Mcdermott | Head | — | 40 | ~1890 |
| Joseph Mcdermott | Son | — | 15 | ~1915 |
| Robert Mcdermott | Son | — | 2 | ~1928 |
| Mary Mcdermott | Other | — | 36 | ~1894 |
| Paul Mcdermott | Son | — | 10 | ~1920 |
| William Mcdermott | Son | — | 16 | ~1914 |
| Grace Mcdermott | Daughter | — | 1 | ~1929 |
| Dolores Mcdermott | Daughter | — | 6 | ~1924 |
| Marie Mcdermott | Daughter | — | 13 | ~1917 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 6
Allegheny, Pennsylvania · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 16
Allegheny, Pennsylvania · implied b. ~1914 — 9 household members
| Surname | McDermott |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | none |
| Can Read/Write | Yes |
| 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 William Mcdermott across 2 US Census years (1920 and 1930) in Allegheny, Pennsylvania, using XGBoost record linkage.
Show:
This person
Anchor record
William Mcdermott
Son · 1930 · age 16 · b. ~1914 · Pennsylvania
★ You are viewing this record
Sibling
Paul Mcdermott
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Mcdermott
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dolores Mcdermott
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Grace Mcdermott
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Mcdermott
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mcdermott
Sibling · 1930 · age 2
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
1930 US Federal Census — Allegheny, Pennsylvania
Open full size
1930 US Federal Census — Allegheny, Pennsylvania
Page Contents
29 people indexed on this census page (ia:1930:fifteenthcensus00reel1981:1004)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Michael Tomko | 36 | Head | Cook | Austria |
| 2 | Mary Tomko | 33 | Wife-H | None | Pennsylvania |
| 3 | Anna M. Tomko | 11 | daughter | None | Pennsylvania |
| 4 | Joseph Tomko | 9 | Son | None | Pennsylvania |
| 5 | Virginia Tomko | 8 | daughter | None | Ohio |
| 6 | Edward Tomko | 1 | Son | None | Pennsylvania |
| 7 | Julius R. Mudar | 43 | Head | Clerk | Pennsylvania |
| 8 | Elizabeth Mudar | 42 | Wife-H | None | Pennsylvania |
| 9 | Richard Mudar | 11 | Son | None | Pennsylvania |
| 10 | William Mcdermott | 40 | Head | Laborer | Ohio |
| 11 | Mary Mcdermott | 36 | wife-H | None | Ohio |
| 12 | William Mcdermott THIS PERSON | 16 | Son | None | Pennsylvania |
| 13 | Joseph Mcdermott | 15 | Son | None | Pennsylvania |
| 14 | Marie Mcdermott | 13 | daughter | None | Pennsylvania |
| 15 | Paul Mcdermott | 10 | Son | None | Pennsylvania |
| 16 | Dolores Mcdermott | 6 | daughter | None | Pennsylvania |
| 17 | Robert Mcdermott | 2 | Son | None | Pennsylvania |
| 18 | Grace Mcdermott | 1 | daughter | None | Pennsylvania |
| 19 | — | None | — | — | — |
| 20 | — | None | — | — | — |
| 21 | John F Halter | 41 | Head | Mechanic | France |
| 22 | Margaret Halter | 24 | Wife-H | None | Pennsylvania |
| 23 | — | None | — | — | — |
| 24 | — | None | — | — | — |
| 25 | — | None | — | — | — |
| 26 | — | None | — | — | — |
| 27 | — | None | — | — | — |
| 28 | Herbert Jones | 61 | Head | Laborer | Pennsylvania |
| 29 | Elizabeth Jones | 56 | Wife-H | None | Pennsylvania |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)