WF
William Fitzgerald — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this William Fitzgerald across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents John & Rose — first a son (b.~1919), then head of a 7-person household.
Age 21
b. ~1919
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Fitzgerald |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | None Worker |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | None Worker |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1919 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Rose Fitzgerald | Head | — | 45 | ~1895 |
| Lawrence Fitzgerald | Son | — | 20 | ~1920 |
| William Fitzgerald | Son | — | 21 | ~1919 |
| Anthony Fitzgerald | Son | — | 13 | ~1927 |
| John Fitzgerald | Son | — | 27 | ~1913 |
| David Fitzgerald | Son | — | 19 | ~1921 |
| Richard Fitzgerald | Son | — | 24 | ~1916 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 1
Allegheny, Pennsylvania · implied b. ~1919 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzgerald |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 11
Allegheny, Pennsylvania · implied b. ~1919 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzgerald |
| Given Name | William G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| 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
Son, age 21
Allegheny-County, Pennsylvania · implied b. ~1919 — 7 household members
| Surname | Fitzgerald |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | None Worker |
| Income (1939) | 0 |
| Highest Grade | H 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 William Fitzgerald across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Fitzgerald (~0.92 confidence) and mother Rose Fitzgerald (~0.92 confidence) and mother Rose Fitzgerald (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Fitzgerald
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Rose Fitzgerald
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Rose Fitzgerald
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Fitzgerald
Son · 1940 · age 21 · b. ~1919 · Pennsylvania
★ You are viewing this record
Sibling
David Fitzgerald
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Fitzgerald
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Fitzgerald
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Fitzgerald
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anthony Fitzgerald
Sibling · 1940 · age 13
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-t0627-03657-00260)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles Weiherer | 38 | Head | Cooper | Germany |
| 2 | Emma A. Weiherer | 37 | Wife | — | Pennsylvania |
| 3 | Ruth Weiherer | 17 | Daughter | Stenographer | Pennsylvania |
| 4 | Shirley Weiherer | 8 | Daughter | — | Pennsylvania |
| 5 | Graham Hay | 50 | Head | Tool Room Clerk | Pennsylvania |
| 6 | Mary Hay | 57 | Wife | — | Pennsylvania |
| 7 | Jack Hay | 19 | Son | Service Attendant | Pennsylvania |
| 8 | Bill Hay | 3 | Son | — | Pennsylvania |
| 9 | Edward Gavlick | 47 | Head | Clerk File | Austria |
| 10 | Martha Gavlick | 42 | Wife | — | Pennsylvania |
| 11 | Jean Gavlick | 22 | Daughter | Clerk - Store | Pennsylvania |
| 12 | Charles Brown | 61 | Head | Template Maker | Pennsylvania |
| 13 | Sarah Brown | 65 | Wife | — | England |
| 14 | Charles Brown | 30 | Son | Patrolman | Pennsylvania |
| 15 | Nellie Fitzgerald | 53 | Sister | Cleaner | Pennsylvania |
| 16 | Mary Fitzgerald | 57 | Sister | — | Pennsylvania |
| 17 | Margaret Fitzgerald | 47 | Sister | Cleaner | Pennsylvania |
| 18 | Rose Fitzgerald | 45 | Head | — | Pennsylvania |
| 19 | John Fitzgerald | 27 | Son | Clerk General | Pennsylvania |
| 20 | Richard Fitzgerald | 24 | Son | Sub Mail Carrier | Pennsylvania |
| 21 | William Fitzgerald THIS PERSON | 21 | Son | None Worker | Pennsylvania |
| 22 | Lawrence Fitzgerald | 20 | Son | None Worker | Pennsylvania |
| 23 | David Fitzgerald | 19 | Son | — | Pennsylvania |
| 24 | Anthony Fitzgerald | 13 | Son | — | Pennsylvania |
| 25 | Clement Baker | 36 | Head | Radio Repair | Pennsylvania |
| 26 | Anna Baker | 32 | Wife | — | Pennsylvania |
| 27 | Clement Jr. Baker | 11 | Son | — | Pennsylvania |
| 28 | Anna Pearl Baker | 8 | Daughter | — | Pennsylvania |
| 29 | Mary Louise Baker | 6 | Daughter | — | Pennsylvania |
| 30 | Nancy Baker | 4 | Daughter | — | Pennsylvania |
| 31 | Lorraine Baker | 1 | Daughter | — | Pennsylvania |
| 32 | Patrick O'Connell | 31 | Head | Policeman | Illinois |
| 33 | Helen O'Connell | 25 | Wife | — | Pennsylvania |
| 34 | Patsy O'Connell | 4 | Daughter | — | Pennsylvania |
| 35 | Patrick O'Connell | 77 | Father | — | Irish Free State |
| 36 | Jerry Buckley | 40 | Step-Brother | Laborer | Illinois |
| 37 | F. M. Bigley | 45 | Head | Clerk File | Pennsylvania |
| 38 | Marie E. Bigley | 73 | Mother | — | Massachusetts |
| 39 | Lucille Hagerty | 42 | Sister | — | Pennsylvania |
| 40 | John J. Hagerty | 40 | Brother-in-law | Clerk - Train | Pennsylvania |
Pedigree Summary
William + 5 siblings
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)