JI
John Irwin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Knox-County, Tennessee
Our Model Tree links this John Irwin across the 1930 and 1940 US Censuses in Knox-County, Tennessee (XGBoost, ~Confirmed) — first a son (b.~1918), then head of a 7-person household.
Age 22
b. ~1918
Male
Son
Born: Tennessee
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Knox-County, Tennessee |
| Surname | Irwin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | Knoxville |
| 1935 Residence (County) | Knox |
| Additional Details | |
| Occupation | pressman |
| Industry | lithographing |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 300 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Occupation | Pressman |
| Township / Ward | Knoxville |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Irwin | Son | — | 22 | ~1918 |
| Connell Irwin | Son | — | 9 | ~1931 |
| Thomas Irwin | Head | — | 55 | ~1885 |
| Mary Irwin | Spouse | — | 48 | ~1892 |
| Thomas Irwin | Son | — | 14 | ~1926 |
| Pattie Irwin | Daughter | — | 17 | ~1923 |
| James Irwin | Son | — | 19 | ~1921 |
Census Appearances
1930
Knox, Tennessee
Son, age 12
Knox, Tennessee · implied b. ~1918 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Irwin |
| Given Name | John G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Wisconsin |
| Can Read/Write | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Knox-County, Tennessee
Son, age 22
Knox-County, Tennessee · implied b. ~1918 — 7 household members
| Surname | Irwin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | Knoxville |
| 1935 Residence (County) | Knox |
| Occupation | pressman |
| Industry | lithographing |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 300 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
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 Irwin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Irwin
Son · 1940 · age 22 · b. ~1918 · Tennessee
★ You are viewing this record
Sibling
Thomas Irwin
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Connell Irwin
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Pattie Irwin
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Irwin
Sibling · 1940 · age 19
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 — Knox-County, Tennessee
Open full size
1940 US Federal Census — Knox-County, Tennessee
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03956-00354)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Annie L Ashburne | 77 | Head | — | Illinois |
| 42 | Wm H Kershaw | 21 | Head | Salesman | Tennessee |
| 43 | Bessie R Kershaw | 20 | Wife | — | Tennessee |
| 44 | Horace C V Kershaw | 0 | Son | — | Tennessee |
| 45 | A. B. Smith | 67 | Head | Salesman | Tennessee |
| 46 | Manila Smith | 43 | Wife | — | Tennessee |
| 47 | Nancy Smith | 14 | Daughter | — | Tennessee |
| 48 | Irene A Smith | 75 | Sister | — | Tennessee |
| 49 | Mary Smith | 70 | Sister | — | Tennessee |
| 50 | Gilbert Riley | 47 | Head | Clerk | Tennessee |
| 51 | Mary J Riley | 80 | Mother | — | Ireland |
| 52 | Harold E Clark | 46 | Head | Piano Service Mechanic | Tennessee |
| 53 | Bertha R Clark | 57 | Wife | Music Teacher | Ohio |
| 54 | Katherine Douglas | 24 | Daughter | — | West Virginia |
| 55 | Thomas D Douglas | 10 | Grandson | — | Washington |
| 56 | Benton J H Douglas | 3 | Grandson | — | Tennessee |
| 57 | Mac Irwin | 45 | Roomer | Bookkeeper | Virginia |
| 58 | Thomas Irwin | 55 | Head | Plumber | Tennessee |
| 59 | Mary Irwin | 48 | Wife | — | Tennessee |
| 60 | John Irwin THIS PERSON | 22 | Son | Pressman | Tennessee |
| 61 | James Irwin | 19 | Son | — | Tennessee |
| 62 | Pattie Rose Irwin | 17 | Daughter | — | Tennessee |
| 63 | Thomas Jr Irwin | 14 | Son | — | Tennessee |
| 64 | Connell Irwin | 9 | Son | — | Tennessee |
| 65 | William P Morton | 57 | Head | Special Agent | Tennessee |
| 66 | Jennie B Morton | 55 | Wife | — | Tennessee |
| 67 | Charles W Morton | 23 | Son | New Worker | Tennessee |
| 68 | Ira Bernard Morton | 20 | Son | New Worker | Tennessee |
| 69 | Eva Mae Morton | 16 | Daughter | — | Tennessee |
| 70 | J A Wells | 54 | Head | Carpenter | Tennessee |
| 71 | Mamie Wells | 49 | Wife | — | Tennessee |
| 72 | Anna Joe Wells | 14 | Daughter | — | Tennessee |
| 73 | A B Thorpe | 24 | Roomer | Bookkeeper | Tennessee |
| 74 | Ester Lacy | 20 | Roomer | — | Tennessee |
| 75 | Mary Philpott | 38 | Roomer | Retail Grocery Store | Tennessee |
| 76 | A N Scheib | 40 | Roomer | Retail Grocery Store | New York |
| 77 | Lillian Scheib | 29 | Roomer | Retail Grocery Store | Massachusetts |
| 78 | Harry W Paquitti | 22 | Head | Carrier | Tennessee |
| 79 | Juanita W Paquitti | 22 | Wife | Copying | Tennessee |
| 80 | Mary Patricia Paquitti | 1 | Daughter | — | Tennessee |
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)