WF
William Fitzpatrick — 1940 US Census Record
Model Tree available1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this William Fitzpatrick across the 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1911), then head of a 5-person household.
Age 29
b. ~1911
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Fitzpatrick |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Collingdale Borough |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Occupation | mechanic |
| Industry | Automobile assembly Co |
| Class of Worker | PW |
| Income (1939) | 1600 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Mechanic |
| Township / Ward | Collingdale Borough |
| Est. Birth Year | ~1911 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Fitzpatrick | Head | — | 58 | ~1882 |
| Sarah Fitzpatrick | Daughter | — | 24 | ~1916 |
| William Fitzpatrick | Son | — | 29 | ~1911 |
| Hugh Fitzpatrick | Son | — | 30 | ~1910 |
| Margaret Fitzpatrick | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Delaware, Pennsylvania
Son, age 9
Delaware, Pennsylvania · implied b. ~1911 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzpatrick |
| Given Name | William |
| 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 | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Delaware, Pennsylvania
Son, age 19
Delaware, Pennsylvania · implied b. ~1911 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzpatrick |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Trimmer |
| Industry | Automobile |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Delaware-County, Pennsylvania
Son, age 29
Delaware-County, Pennsylvania · implied b. ~1911 — 5 household members
| Surname | Fitzpatrick |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Collingdale Borough |
| 1935 Residence (County) | Delaware |
| Occupation | mechanic |
| Industry | Automobile assembly Co |
| Class of Worker | PW |
| Income (1939) | 1600 |
| Highest Grade | 8 |
| 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 William Fitzpatrick across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Fitzpatrick (~0.92 confidence) and father William Fitzpatrick (~0.92 confidence) and father William Fitzpatrick (~0.92 confidence) and mother Margaret Fitzpatrick (~0.92 confidence) and mother Margaret Fitzpatrick (~0.92 confidence) and mother Margaret Fitzpatrick (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Fitzpatrick
b. ~1882
Source father
● Household
· direct · ~0.92
Father
William Fitzpatrick
b. ~1879
Source father
● Household
· direct · ~0.92
Father
William Fitzpatrick
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Margaret Fitzpatrick
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Margaret Fitzpatrick
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Margaret Fitzpatrick
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Fitzpatrick
Son · 1940 · age 29 · b. ~1911 · Pennsylvania
★ You are viewing this record
Sibling
Sarah Fitzpatrick
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hugh Fitzpatrick
Sibling · 1940 · age 30
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 — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03490-00372)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Joseph Dorsey | 18 | son | Laborer | Pennsylvania |
| 42 | Robert Dorsey | 17 | son | — | Pennsylvania |
| 43 | Francis Dorsey | 14 | son | — | Pennsylvania |
| 44 | Oscar Davis | 48 | Head | Operator | New Jersey |
| 45 | Carrie Davis | 49 | wife | — | Pennsylvania |
| 46 | Dorothy Davis | 19 | daughter | New Worker | Pennsylvania |
| 47 | Andrew Davis | 15 | son | Clerk | Pennsylvania |
| 48 | Warren Davis | 5 | son | — | Pennsylvania |
| 49 | William Fitzpatrick | 58 | Head | Officer | Pennsylvania |
| 50 | Margaret Fitzpatrick | 57 | wife | — | Pennsylvania |
| 51 | Hugh Fitzpatrick | 30 | son | Pipefitter | Pennsylvania |
| 52 | William Fitzpatrick THIS PERSON | 29 | son | Mechanic | Pennsylvania |
| 53 | Sarah Fitzpatrick | 24 | daughter | Clerk | Pennsylvania |
| 54 | William Mckenna | 30 | Head | Teller | Pennsylvania |
| 55 | John Mckenna | 25 | brother | Salesman | Pennsylvania |
| 56 | Edward Mckenna | 19 | brother | Clerk | Pennsylvania |
| 57 | Charles Hutchinson | 24 | Head | Clerk | Pennsylvania |
| 58 | Sara Hutchinson | 20 | wife | Stenographer | Pennsylvania |
| 59 | Gunnar Alm | 39 | Head | Attendant | Sweden |
| 60 | Sophie Alm | 31 | wife | Clerk | Germany |
| 61 | Adele Alm | 10 | daughter | — | Pennsylvania |
| 62 | William Torrens | 54 | Head | — | Scotland |
| 63 | Sarah Torrens | 50 | wife | Visitor | Pennsylvania |
| 64 | Olga Torrens | 19 | daughter | — | Pennsylvania |
| 65 | Raymond Edwards | 44 | Head | Pipefitter | Pennsylvania |
| 66 | Dorothy Edwards | 42 | wife | — | Pennsylvania |
| 67 | Raymond Edwards | 18 | son | — | Pennsylvania |
| 68 | William Edwards | 16 | son | — | Pennsylvania |
| 69 | Wayne Edwards | 9 | son | — | Pennsylvania |
| 70 | Charles Maisch | 41 | Head | Clerk | Pennsylvania |
| 71 | Mabel Maisch | 35 | wife | — | Pennsylvania |
| 72 | Charles Maisch | 12 | son | — | Pennsylvania |
| 73 | Clifford Hoag | 42 | Head | Printer | Pennsylvania |
| 74 | Esther Hoag | 41 | wife | — | Pennsylvania |
| 75 | Robert Hoag | 15 | son | — | Pennsylvania |
| 76 | Mildred Hoag | 14 | daughter | — | Pennsylvania |
| 77 | Helen Hoag | 12 | daughter | — | Pennsylvania |
| 78 | Janet Hoag | 10 | daughter | — | Pennsylvania |
| 79 | Cora Hoag | 64 | mother | — | New York |
| 80 | Frank Defonso | 44 | Head | Locomotive Fireman | Pennsylvania |
Search for William Fitzpatrick
All William Fitzpatrick Census Records Discover Fitzpatrick Family TreePedigree Summary
William + 2 siblings
Gen 1 · 6 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)