MI
Mary Irwin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hamilton-County, Tennessee
Our Model Tree links this Mary Irwin across the 1930 and 1940 US Censuses in Hamilton-County, Tennessee (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 6-person household.
Age 11
b. ~1929
Female
Daughter
Born: Tennessee
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hamilton-County, Tennessee |
| Surname | Irwin |
| Given Name | Mary Alene |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (County) | Hamilton |
| Additional Details | |
| Highest Grade | No 5 |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Township / Ward | 4Th Civil District |
| Est. Birth Year | ~1929 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Sally Irwin | Other | — | 69 | ~1871 |
| Ernest Irwin | Son | — | 17 | ~1923 |
| Mary Irwin | Daughter | — | 11 | ~1929 |
| William Irwin | Head | — | 53 | ~1887 |
| Minnie Irwin | Spouse | — | 39 | ~1901 |
| Clarence Irwin | Son | — | 13 | ~1927 |
Census Appearances
1930
Hamilton, Tennessee
Daughter, age 1
Hamilton, Tennessee · implied b. ~1929 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Irwin |
| Given Name | Marion G |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Georgia |
| Mother's Birthplace | Tennessee |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Hamilton-County, Tennessee
Daughter, age 11
Hamilton-County, Tennessee · implied b. ~1929 — 6 household members
| Surname | Irwin |
| Given Name | Mary Alene |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (County) | Hamilton |
| Highest Grade | No 5 |
| 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 Mary Irwin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Irwin
Daughter · 1940 · age 11 · b. ~1929 · Tennessee
★ You are viewing this record
Sibling
Clarence Irwin
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ernest Irwin
Sibling · 1940 · age 17
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 — Hamilton-County, Tennessee
Open full size
1940 US Federal Census — Hamilton-County, Tennessee
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03899-00459)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dorothy Hall | 4 | Daughter | — | Tennessee |
| 2 | Jeweldene Hall | 2 | Daughter | — | Tennessee |
| 3 | James A Hall | 0 | Son | — | Tennessee |
| 4 | William E Irwin | 53 | Head | Farm | Tennessee |
| 5 | Minnie M Irwin | 39 | Wife | — | Tennessee |
| 6 | Ernest E Irwin | 17 | Son | — | Tennessee |
| 7 | Clarence E Irwin | 13 | Son | — | Tennessee |
| 8 | Mary Alene Irwin THIS PERSON | 11 | Daughter | — | Tennessee |
| 9 | Sally Irwin | 69 | Sister | — | Tennessee |
| 10 | Marvin Orr | 54 | Head | Farm | Georgia |
| 11 | Georgia Orr | 52 | Wife | — | Georgia |
| 12 | Marvin Jr. Orr | 20 | Son | T.V.A. | Georgia |
| 13 | Roy Orr | 12 | Son | — | Tennessee |
| 14 | Flora Orr | 9 | Daughter | — | Tennessee |
| 15 | Fate Pruitt | 31 | Head | Road Project | Tennessee |
| 16 | Rosa Q Pruitt | 32 | Wife | — | Georgia |
| 17 | Carl Ford | 16 | Step-son | T.V.A. | Tennessee |
| 18 | Dorothy Ford | 15 | Step-daughter | — | Tennessee |
| 19 | Lucile Ford | 13 | Step-daughter | — | Tennessee |
| 20 | Betty Pruitt | 2 | Daughter | — | Tennessee |
| 21 | Shirley Pruitt | 0 | Daughter | — | Tennessee |
| 22 | James Q Bettis | 34 | Head | Operator | Tennessee |
| 23 | Marie Bettis | 31 | Wife | — | Tennessee |
| 24 | Neil Bettis | 12 | Son | — | Tennessee |
| 25 | Clyde Bettis | 8 | Son | — | Tennessee |
| 26 | George Denton | 56 | Head | Farm | Tennessee |
| 27 | Elizabeth Denton | 29 | Wife | — | Tennessee |
| 28 | Lorena Denton | 11 | Daughter | — | Tennessee |
| 29 | Marvin Denton | 10 | Son | — | Tennessee |
| 30 | Kathryn Denton | 9 | Daughter | — | Tennessee |
| 31 | Imagene Denton | 6 | Daughter | — | Tennessee |
| 32 | Chester Denton | 5 | Son | — | Tennessee |
| 33 | Otis Denton | 3 | Son | — | Tennessee |
| 34 | George Jr. Denton | 1 | Son | — | Tennessee |
| 35 | Odie Farrell | 35 | Head | Farmer | Alabama |
| 36 | Mae Q Farrell | 29 | Wife | — | Alabama |
| 37 | Cecil Farrell | 12 | Son | — | Alabama |
| 38 | Jacquetta Farrell | 11 | Daughter | — | Alabama |
| 39 | Dorothy Farrell | 7 | Daughter | — | Alabama |
| 40 | Odell Farrell | 3 | Daughter | — | Alabama |
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)