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William Hoffman — 1920 US Census Record
Model Tree available1920 United States Federal Census · St Clair, Illinois
Our Model Tree links this William Hoffman across the 1910, 1920 and 1930 US Censuses in St Clair, Illinois (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1910), then head of a 8-person household.
Age 10
b. ~1910
Male
Son
Born: Illinois
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | St Clair, Illinois |
| Surname | Hoffman |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Millstadt Township |
| Est. Birth Year | ~1910 |
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.
8 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Ollie Hoffman | Daughter | — | 7 | ~1913 |
| Alma Hoffman | Daughter | — | 15 | ~1905 |
| Lydia Hoffman | Daughter | — | 18 | ~1902 |
| Frieda Hoffman | Daughter | — | 13 | ~1907 |
| Henrietta Hoffman | Daughter | — | 5 | ~1915 |
| John Hoffman | Head | — | 51 | ~1869 |
| William Hoffman | Son | — | 10 | ~1910 |
| Henrietta Hoffman | Spouse | — | 46 | ~1874 |
Census Appearances
1910
St Clair, …
Son, age
St Clair, Illinois · implied b. ~1910 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hoffmann |
| Given Name | William J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
St Clair, …
Son, age 10
St Clair, Illinois · implied b. ~1910 — 8 household members
| Surname | Hoffman |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
St Clair, …
Son, age 20
St Clair, Illinois · implied b. ~1910 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hoffmann |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Clerk |
| Industry | Telephone Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| 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 Hoffman across 3 US Census years (1910, 1920 and 1930) in St Clair, Illinois, using XGBoost record linkage. Identified parents: father John Hoffman (~0.92 confidence) and father John Hoffmann (~0.92 confidence) and father John Hoffmann (~0.92 confidence) and mother Lydia Hoffmann (~0.92 confidence) and mother Henrietta Hoffmann (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Hoffman
b. ~1869
Source father
● Household
· direct · ~0.92
Father
John Hoffmann
b. ~1869
Source father
● Household
· direct · ~0.92
Father
John Hoffmann
b. ~1869
Source father
● Household
· direct · ~0.92
Mother
Lydia Hoffmann
b. ~1874
Source mother
● Household
· direct · ~0.92
Mother
Henrietta Hoffmann
b. ~1874
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Hoffman
Son · 1920 · age 10 · b. ~1910 · Illinois
★ You are viewing this record
Sibling
Alma Hoffman
Sibling · 1920 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lydia Hoffman
Sibling · 1920 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frieda Hoffman
Sibling · 1920 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ollie Hoffman
Sibling · 1920 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henrietta Hoffman
Sibling · 1920 · age 5
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
1920 US Federal Census — St Clair, Illinois
Open full size
1920 US Federal Census — St Clair, Illinois
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu403unit:1123)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Vincent Maurang | 5 | Son | — | Illinois |
| 2 | George Maurang | 67 | Head | Walker | Illinois |
| 3 | Victoria Maurang | 54 | Wife | — | Illinois |
| 4 | Augusta Maurang | 21 | Daughter | — | Illinois |
| 5 | Alfred Maurang | 18 | Son | — | Illinois |
| 6 | Lizetta Gaertner | 64 | Head | — | Illinois |
| 7 | Eva Dilbacher | 73 | Head | — | Illinois |
| 8 | Charles L. Master | 35 | Head | Veterinary | Illinois |
| 9 | Mary Master | 32 | Wife | — | Illinois |
| 10 | Charles Jr. Master | 8 | Son | — | Illinois |
| 11 | August Harper | 37 | Head | Merchant | Illinois |
| 12 | Ida Harper | 30 | Wife | — | Illinois |
| 13 | Louis Sr. Harper | 62 | Head | — | Illinois |
| 14 | Anna Harper | 55 | Wife | — | Missouri |
| 15 | Sam Muskopf | 70 | Head | — | Illinois |
| 16 | Pauline Muskopf | 72 | Wife | — | Germany |
| 17 | William Muskopf | 44 | Son | — | Illinois |
| 18 | George Diesel | 34 | Head | Physician | Illinois |
| 19 | Andrew Diesel | 40 | Head | Teamster | Illinois |
| 20 | Minnie Diesel | 36 | Wife | — | Illinois |
| 21 | Andrew Diesel | 11 | Son | — | Missouri |
| 22 | Minnie Walter | 36 | Sister | — | Illinois |
| 23 | Arthur Schmidt | 24 | Boarder | Auto Repair | Illinois |
| 24 | Louis Wagner | 35 | Head | Foreman | Illinois |
| 25 | Pauline Wagner | 18 | Wife | — | South Carolina |
| 26 | John Hoffman | 51 | Head | Section Hand | Illinois |
| 27 | Henrietta Hoffman | 46 | Wife | — | Illinois |
| 28 | Lydia Hoffman | 18 | Daughter | — | Illinois |
| 29 | Alma Hoffman | 15 | Daughter | — | Illinois |
| 30 | Frieda Hoffman | 13 | Daughter | — | Illinois |
| 31 | William Hoffman THIS PERSON | 10 | Son | — | Illinois |
| 32 | Ollie Hoffman | 7 | Daughter | — | Illinois |
| 33 | Henrietta Hoffman | 5 | Daughter | — | Illinois |
| 34 | Katherine Bosse | 67 | Head | — | Illinois |
| 35 | Fred Bosse | 33 | Son | Carpenter | Illinois |
| 36 | Anton Bosse | 26 | Son | Carpenter | Illinois |
| 37 | Katherine Bosse | 22 | Daughter | — | Illinois |
| 38 | Albert C. Pistor | 30 | Head | — | Illinois |
| 39 | Ella Pistor | 31 | Wife | — | Illinois |
| 40 | Lester Pistor | 4 | Son | — | Illinois |
| 41 | Ester Pistor | 4 | Daughter | — | Illinois |
| 42 | Gus Roediger | 52 | Head | Teamster | Illinois |
| 43 | Margaret Roediger | 46 | Wife | — | Illinois |
| 44 | John Diesel | 74 | Head | Wagon Maker | Illinois |
| 45 | Louisa Diesel | 70 | Wife | — | Illinois |
| 46 | Jacob Fischer | 63 | Head | — | Illinois |
| 47 | Elizabeth Fischer | 63 | Wife | — | Illinois |
| 48 | Albert Warth | 32 | Head | Bricklayer | Illinois |
| 49 | Bertha Warth | 28 | Wife | — | Illinois |
| 50 | Fred J. Miller | 75 | Father | — | Illinois |
Pedigree Summary
William + 5 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)