WI
William Irwin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Alpena-County, Michigan
Our Model Tree links this William Irwin across the 1930 and 1940 US Censuses in Alpena-County, Michigan (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 8-person household.
Age 17
b. ~1923
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Alpena-County, Michigan |
| Surname | Irwin |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Alpena |
| 1935 Residence (County) | Alpena |
| Additional Details | |
| Occupation | Laborer |
| Industry | Hatchery |
| Class of Worker | PW |
| Income (1939) | 70 |
| Highest Grade | No 8 |
| 1935 Residence | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | Laborer |
| Township / Ward | Alpena Township |
| Est. Birth Year | ~1923 |
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 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Lee Irwin | Son | — | 13 | ~1927 |
| Shirley Irwin | Daughter | — | 10 | ~1930 |
| Clyde Irwin | Son | — | 2 | ~1938 |
| Harold Irwin | Son | — | 8 | ~1932 |
| William Irwin | Son | — | 17 | ~1923 |
| Joanne Irwin | Daughter | — | 5 | ~1935 |
| Carrie Irwin | Spouse | — | 40 | ~1900 |
| Lee Irwin | Head | — | 42 | ~1898 |
Census Appearances
1930
Alpena, Michigan
Son, age 7
Alpena, Michigan · implied b. ~1923 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Irwin |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | English Canada |
| Mother's Birthplace | Michigan |
| Occupation | School |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Alpena-County, Michigan
Son, age 17
Alpena-County, Michigan · implied b. ~1923 — 8 household members
| Surname | Irwin |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Alpena |
| 1935 Residence (County) | Alpena |
| Occupation | Laborer |
| Industry | Hatchery |
| Class of Worker | PW |
| Income (1939) | 70 |
| Highest Grade | No 8 |
| 1935 Residence | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Irwin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Irwin
Son · 1940 · age 17 · b. ~1923 · Michigan
★ You are viewing this record
Sibling
Lee Irwin
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joanne Irwin
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harold Irwin
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clyde Irwin
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Shirley Irwin
Sibling · 1940 · age 10
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 — Alpena-County, Michigan
Open full size
1940 US Federal Census — Alpena-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01722-00354)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | David Slomski | 2 | son | — | Michigan |
| 42 | Graham Slomski | 1 | son | — | Michigan |
| 43 | Allen G Francis | 41 | Head | Mechanic | Michigan |
| 44 | Adelia Francis | 29 | wife | — | Michigan |
| 45 | Donald Francis | 8 | son | — | Michigan |
| 46 | Jerry Francis | 2 | son | — | Michigan |
| 47 | Fred Hanna | 30 | head | Helper | Michigan |
| 48 | Lloyd Anderson | 35 | head | Driller | Michigan |
| 49 | Leta Anderson | 35 | wife | — | Michigan |
| 50 | Terrence Anderson | 6 | son | — | Michigan |
| 51 | Jerome Anderson | 2 | son | — | Michigan |
| 52 | Carl E Boboltz | 28 | head | Crane Operator | Michigan |
| 53 | Isabelle Boboltz | 24 | wife | — | Michigan |
| 54 | Herman Blankenburg | 41 | head | Laborer | Germany |
| 55 | Anna Blankenburg | 40 | wife | — | Russia |
| 56 | Elli Blankenburg | 16 | daughter | — | Germany |
| 57 | Hilda Blankenburg | 15 | daughter | — | Germany |
| 58 | Gunther Blankenburg | 12 | son | — | Michigan |
| 59 | Gilbert Blankenburg | 10 | son | — | Michigan |
| 60 | Frieda Blankenburg | 7 | daughter | — | Michigan |
| 61 | Earl Blankenburg | 3 | son | — | Michigan |
| 62 | Lee Irwin | 42 | head | Laborer | Canada English |
| 63 | Carrie Irwin | 40 | wife | — | Michigan |
| 64 | William Irwin THIS PERSON | 17 | son | Laborer | Michigan |
| 65 | Lee Jr Irwin | 13 | son | — | Michigan |
| 66 | Shirley Irwin | 10 | daughter | — | Michigan |
| 67 | Harold Irwin | 8 | son | — | Michigan |
| 68 | Joanne Irwin | 5 | daughter | — | Michigan |
| 69 | Clyde Irwin | 2 | son | — | Michigan |
| 70 | Ralph Jhuson|Johnson | 40 | head | Laborer | Michigan |
| 71 | Exilda Jhuson|Johnson | 35 | wife | — | Michigan |
| 72 | Elsie Jhuson|Johnson | 11 | daughter | — | Michigan |
| 73 | Dorothy Jhuson|Johnson | 9 | daughter | — | Michigan |
| 74 | Earl Daoust | 31 | head | Fisherman | Michigan |
| 75 | Leora Daoust | 30 | wife | — | Michigan |
| 76 | Earl Jr Daoust | 8 | son | — | Michigan |
| 77 | Eugene Daoust | 6 | son | — | Michigan |
| 78 | Glen Daoust | 4 | son | — | Michigan |
| 79 | Marlene Daoust | 2 | daughter | — | Michigan |
| 80 | Grace Brown | 61 | widow | Housekeeper | Michigan |
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)