JT
Jack Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mason-County, Michigan
Our Model Tree links this Jack Thomas across the 1930 and 1940 US Censuses in Mason-County, Michigan (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 8-person household.
Age 10
b. ~1930
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mason-County, Michigan |
| Surname | Thomas |
| Given Name | Jack |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Ludington |
| 1935 Residence (County) | Mason |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Ludington |
| Est. Birth Year | ~1930 |
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 Jack | Age | Birth yr |
|---|---|---|---|---|
| Donald Thomas | Son | — | 13 | ~1927 |
| Dolores Thomas | Daughter | — | 12 | ~1928 |
| Mildred Thomas | Spouse | — | 41 | ~1899 |
| Jack Thomas | Son | — | 10 | ~1930 |
| Elaine Thomas | Daughter | — | 18 | ~1922 |
| Bernard Thomas | Head | — | 46 | ~1894 |
| Frances Stapleton | Other | — | 32 | ~1908 |
| Dorothy Thomas | Daughter | — | 16 | ~1924 |
Census Appearances
1930
Mason, Michigan
Son, age
Mason, Michigan · implied b. ~1930 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Jack |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Can Read/Write | No |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Mason-County, Michigan
Son, age 10
Mason-County, Michigan · implied b. ~1930 — 8 household members
| Surname | Thomas |
| Given Name | Jack |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Ludington |
| 1935 Residence (County) | Mason |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| 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 Jack Thomas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Jack Thomas
Son · 1940 · age 10 · b. ~1930 · Michigan
★ You are viewing this record
Sibling
Dorothy Thomas
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elaine Thomas
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dolores Thomas
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Thomas
Sibling · 1940 · age 13
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 — Mason-County, Michigan
Open full size
1940 US Federal Census — Mason-County, Michigan
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01788-00367)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Bernard Thomas | 46 | head | No | Michigan |
| 42 | Mildred A Thomas | 41 | wife | No | Michigan |
| 43 | Elaine Thomas | 18 | daughter | No | Michigan |
| 44 | Dorothy Thomas | 16 | daughter | No | Michigan |
| 45 | Donald Thomas | 13 | son | — | Michigan |
| 46 | Dolores Thomas | 12 | daughter | — | Michigan |
| 47 | Jack Thomas THIS PERSON | 10 | son | — | Michigan |
| 48 | Frances Stapleton | 32 | sister-in-law | Waitress | Michigan |
| 49 | Abel A Johnson | 47 | head | Beer Distributor | Michigan |
| 50 | Beatrice A Johnson | 34 | wife | No | Michigan |
| 51 | Robert Johnson | 9 | son | — | Michigan |
| 52 | Abel Jr. Johnson | 2 | son | — | Michigan |
| 53 | Carl Schrink | 47 | head | Owner | Michigan |
| 54 | Rhea I Schrink | 43 | wife | No | Michigan |
| 55 | Claribel Schrink | 21 | daughter | Clerk | Michigan |
| 56 | Lillian A Kuhagen | 45 | head | Stenographer | Michigan |
| 57 | Theodore Johnson | 39 | brother | Superintendent | Michigan |
| 60 | Joseph Vorac | 37 | head | Shoe Rebuilder | Wisconsin |
| 61 | Irene A Vorac | 30 | wife | No | Missouri |
| 62 | Janet Vorac | 8 | daughter | — | Michigan |
| 63 | Carl Hemmer | 30 | lodger | Punch Press Operator | Michigan |
| 64 | Arthur Hemmer | 24 | lodger | Welding | Michigan |
| 65 | Edith R Javinsky | 32 | head | No | Michigan |
| 66 | Rudolph B Beckstrom | 50 | head | Case Maker | Michigan |
| 67 | Rachel Beckstrom | 49 | wife | Clerk | Michigan |
| 68 | Louis Beckstrom | 22 | son | Clerk | Michigan |
| 69 | Mat Beckstrom | 78 | father | No | Finland |
| 70 | Ambrose Barber | 37 | head | Coal Passer | Michigan |
| 71 | Irene A Barber | 34 | wife | Machine Operator | Michigan |
| 72 | Joan Barber | 14 | daughter | No | Michigan |
| 73 | Harold Barber | 12 | son | — | Michigan |
| 74 | Shirley Barber | 7 | daughter | — | Michigan |
| 75 | Frank A Flodine | 65 | head | Janitor | Sweden |
| 76 | Elvira Flodine | 41 | wife | No | Michigan |
| 77 | Francis Flodine | 3 | son | — | Michigan |
| 78 | Nell P Mallory | 61 | head | Cook | Ohio |
| 79 | Katherine Newberg | 77 | head | No | Wisconsin |
| 80 | Katherine Newberg | 48 | daughter | Teacher | 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)