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William Fitzgerald — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Denver-County, Colorado
Our Model Tree links this William Fitzgerald across the 1920, 1930 and 1940 US Censuses in Denver-County, Colorado (XGBoost, ~Confirmed) — first a head (b.~1899), then head of a 4-person household.
Age 41
b. ~1899
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Denver-County, Colorado |
| Surname | Fitzgerald |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | City and County of Denver |
| 1935 Residence (County) | Denver |
| Additional Details | |
| Occupation | Fireman |
| Industry | City Fire Dept |
| Class of Worker | GW |
| Hours Worked | 72 |
| Income (1939) | 1920 |
| Highest Grade | 8 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Fireman |
| Township / Ward | City And County Of Denver |
| Est. Birth Year | ~1899 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Fitzgerald | Daughter | — | 4 | ~1936 |
| William Fitzgerald | Head | — | 41 | ~1899 |
| Mother Coghlan | Other | — | 65 | ~1875 |
| Laura Fitzgerald | Spouse | — | 42 | ~1898 |
Census Appearances
1920
Denver, Colorado
Head, age 20
Denver, Colorado · implied b. ~1900 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzgerald |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | United States |
| Mother's Birthplace | United States |
| Occupation | Tinner |
| Industry | Hardware Co. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Denver, Colorado
Head, age 30
Denver, Colorado · implied b. ~1900 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzgerald |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 29 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Fireman |
| Industry | Fire Department |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 4000 |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Denver-County, Colorado
Head, age 41
Denver-County, Colorado · implied b. ~1899 — 4 household members
| Surname | Fitzgerald |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | City and County of Denver |
| 1935 Residence (County) | Denver |
| Occupation | Fireman |
| Industry | City Fire Dept |
| Class of Worker | GW |
| Hours Worked | 72 |
| Income (1939) | 1920 |
| Highest Grade | 8 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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.
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This person
Anchor record
William Fitzgerald
Head · 1940 · age 41 · b. ~1899 · Colorado
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Denver-County, Colorado
Open full size
1940 US Federal Census — Denver-County, Colorado
Page Contents
10 people indexed on this census page (nara:1940:m-t0627-00484-00075)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ruelord|Ruelard Rinnie | 28 | Head | Truck Driver | Colorado |
| 42 | Betty Rinnie | 26 | Wife | — | Colorado |
| 43 | Richard Rinnie | 8 | Son | — | Colorado |
| 44 | Jeanne Rinnie | 3 | Daughter | — | Colorado |
| 45 | Frank U. Ptacek | 57 | Head | Tailor | New York |
| 46 | Estelle Ptacek | 57 | Wife | — | Pennsylvania |
| 47 | William Fitzgerald THIS PERSON | 41 | Head | Fireman | Illinois |
| 48 | Laura Fitzgerald | 42 | Wife | — | Pennsylvania |
| 49 | Elizabeth Fitzgerald | 4 | Daughter | — | Colorado |
| 50 | Mother Coghlan | 65 | Mother | — | Illinois |
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)