WF
William Fitzgerald — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this William Fitzgerald across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1918), then head of a 5-person household.
Age 22
b. ~1918
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Fitzgerald |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Clerk |
| Industry | N. Y. C. Office |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 96 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Clerk |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1918 |
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 |
|---|---|---|---|---|
| Helen Fitzgerald | Head | — | 56 | ~1884 |
| Helen Houk | Other | — | 21 | ~1919 |
| Helen Saunders | Other | — | 21 | ~1919 |
| William Fitzgerald | Son | — | 22 | ~1918 |
| Michael O'Connor | Son | — | 20 | ~1920 |
Census Appearances
1920
Polk, Iowa
Son, age 2
Polk, Iowa · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzgerald |
| Given Name | William E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Son, age 12
Polk, Iowa · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzgerald |
| Given Name | William P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Son, age 22
Polk-County, Iowa · implied b. ~1918 — 5 household members
| Surname | Fitzgerald |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Clerk |
| Industry | N. Y. C. Office |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 96 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 William Fitzgerald (~0.92 confidence) and father William Fitzgerald (~0.92 confidence) and mother Helen Fitzgerald (~0.92 confidence) and mother Ellen Fitzgerald (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Fitzgerald
b. ~1882
Source father
● Household
· direct · ~0.92
Father
William Fitzgerald
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Helen Fitzgerald
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Ellen Fitzgerald
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Fitzgerald
Son · 1940 · age 22 · b. ~1918 · Iowa
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Sibling
Michael O'Connor
Sibling · 1940 · age 20
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 — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
20 people indexed on this census page (nara:1940:m-t0627-01194-00103)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jerry Richard Wickert | 2 | Son | — | Iowa |
| 2 | Helen Fitzgerald | 56 | Head | — | Iowa |
| 3 | William Fitzgerald THIS PERSON | 22 | Son | Clerk | Iowa |
| 4 | Michael O'Connor | 20 | Son | Salesman | Iowa |
| 5 | Helen V. Houk | 21 | Sister | House Work | Iowa |
| 6 | Helen M. Saunders | 21 | Granddaughter | Pres. Instructor | Iowa |
| 7 | James Mcconkey | 32 | Head | Contractor | Iowa |
| 8 | Doris B. Mcconkey | 27 | Wife | — | Iowa |
| 9 | James Jr. Mcconkey | 4 | Son | — | Iowa |
| 10 | Daniel Mcconkey | 2 | Son | — | Iowa |
| 11 | Marie Helland | 23 | Sister-in-law | Nurse | Iowa |
| 12 | Wayne Van Gorp | 33 | Head | Supervisor | Iowa |
| 13 | Irene Van Gorp | 23 | Wife | — | Iowa |
| 14 | Roland Warner | 43 | Head | Salesman | Iowa |
| 15 | C. Marie V. Warner | 38 | Wife | — | Iowa |
| 16 | Peggy Warner | 2 | Daughter | — | Iowa |
| 17 | Sandra Warner | 0 | Daughter | — | Iowa |
| 18 | Betty De Loss | 16 | Daughter | — | Iowa |
| 19 | John De Loss | 10 | Son | — | Iowa |
| 20 | Daisy Kingman | 66 | Sister-in-law | — | Iowa |
Pedigree Summary
William + 1 sibling
Gen 1 · 4 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)