JF
John Fitzgerald — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sussex-County, Delaware
Our Model Tree links this John Fitzgerald across the 1920, 1930 and 1940 US Censuses in Sussex-County, Delaware (XGBoost, ~Confirmed), with identified parents Hannah & John — first a head (b.~1909), then head of a 6-person household.
Age 31
b. ~1909
Male
Head
Born: Delaware
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sussex-County, Delaware |
| Surname | Fitzgerald |
| Given Name | John J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Delaware |
| 1935 Residence (City) | 1st Rep District Representative |
| 1935 Residence (County) | Sussex |
| Additional Details | |
| Occupation | Dealer |
| Industry | Junk |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 156 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
| Occupation | Dealer |
| Township / Ward | 1St Rep District Representative |
| Est. Birth Year | ~1909 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Barbara Fitzgerald | Daughter | — | 6 | ~1934 |
| Ann Fitzgerald | Daughter | — | 5 | ~1935 |
| John Fitzgerald | Head | — | 31 | ~1909 |
| Alice Fitzgerald | Son | — | 2 | ~1938 |
| John Fitzgerald | Son | — | 3 | ~1937 |
| Lillie Fitzgerald | Spouse | — | 29 | ~1911 |
Census Appearances
1920
Sussex, Delaware
Son, age 10
Sussex, Delaware · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzgerald |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Delaware |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1930
Sussex, Delaware
Son, age 21
Sussex, Delaware · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzgerald |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Delaware |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Occupation | Auto-Mechanic |
| Industry | Garage |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1940
Sussex-County, Delaware
Head, age 31
Sussex-County, Delaware · implied b. ~1909 — 6 household members
| Surname | Fitzgerald |
| Given Name | John J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Delaware |
| 1935 Residence (City) | 1st Rep District Representative |
| 1935 Residence (County) | Sussex |
| Occupation | Dealer |
| Industry | Junk |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 156 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
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 John Fitzgerald across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Hannah Fitzgerald (~0.92 confidence) and father John Fitzgerald (~0.92 confidence) and mother Sallie Fitzgerald (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Hannah Fitzgerald
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
John Fitzgerald
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Sallie Fitzgerald
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Fitzgerald
Head · 1940 · age 31 · b. ~1909 · Delaware
★ 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 — Sussex-County, Delaware
Open full size
1940 US Federal Census — Sussex-County, Delaware
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00547-00154)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John J Fitzgerald THIS PERSON | 31 | Head | Dealer | Delaware |
| 2 | Lillie P Fitzgerald | 29 | Wife | — | Delaware |
| 3 | Barbara Fitzgerald | 6 | Daughter | — | Delaware |
| 4 | Ann M Fitzgerald | 5 | Daughter | — | Delaware |
| 5 | John J Fitzgerald | 3 | Son | — | Delaware |
| 6 | Alice L Fitzgerald | 2 | Son | — | Delaware |
| 7 | Harry G Swain | 29 | Head | Laborer | Delaware |
| 8 | Hazel B Swain | 27 | Wife | — | Delaware |
| 9 | Harry Swain | 5 | Son | — | Delaware |
| 10 | Donald Swain | 4 | Son | — | Delaware |
| 11 | Archie Carey | 30 | Head | Laborer | Delaware |
| 12 | Virgie Carey | 27 | Wife | — | Delaware |
| 13 | Marie Carey | 4 | Daughter | — | Delaware |
| 14 | Archie Carey | 0 | Son | — | Delaware |
| 15 | Henry T Warren | 58 | Head | Farmer | Delaware |
| 16 | Annie Warren | 45 | Wife | Laborer | Delaware |
| 17 | Stella M Warren | 23 | Daughter | Laborer | Delaware |
| 18 | Dora Warren | 20 | Daughter | Laborer | Delaware |
| 19 | Dorothy Warren | 16 | Daughter | — | Delaware |
| 20 | Asa Warren | 14 | Son | — | Delaware |
| 21 | Robert Warren | 12 | Son | — | Delaware |
| 22 | William Warren | 10 | Son | — | Delaware |
| 23 | Harriet Warren | 9 | Daughter | — | Delaware |
| 24 | Alice Warren | 7 | Daughter | — | Delaware |
| 25 | Ella Warren | 62 | Sister | — | Delaware |
| 26 | Emma Donovan | 48 | Head | — | Delaware |
| 27 | William Donovan | 16 | Son | — | Delaware |
| 28 | Mollie Donovan | 63 | Cousin | — | Delaware |
| 29 | Frank May | 45 | Head | Farmer | Delaware |
| 30 | Eleanora May | 45 | Wife | — | Delaware |
| 31 | Loretta May | 25 | Daughter | Laborer | Delaware |
| 32 | Joseph May | 22 | Son | Laborer | Delaware |
| 33 | Margeritta May | 7 | Granddaughter | — | Delaware |
| 34 | Heiriah Fitzgerald | 56 | Head | Attendant | Delaware |
| 35 | Lora Fitzgerald | 54 | Wife | — | Delaware |
| 36 | Heiriah Fitzgerald | 23 | Son | Laborer | Delaware |
| 37 | Irene Fitzgerald | 18 | Daughter | — | Delaware |
| 38 | Betty Fitzgerald | 6 | Son | — | Delaware |
| 39 | Charles Martin | 36 | Head | Farmer | Delaware |
| 40 | Willie Martin | 10 | Son | — | Delaware |
Pedigree Summary
John
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)