MT
Mary Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Chatham-County, Georgia
Our Model Tree links this Mary Thomas across the 1920, 1930 and 1940 US Censuses in Chatham-County, Georgia (XGBoost, ~Confirmed), with identified parents William & Mark — first a daughter (b.~1918), then head of a 6-person household.
Age 22
b. ~1918
Female
Daughter
Born: Georgia
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Chatham-County, Georgia |
| Surname | Thomas |
| Given Name | Mary L. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Georgia |
| 1935 Residence (City) | Savannah |
| 1935 Residence (County) | Chatham |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | C 2 |
| 1935 Residence | Same Place |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
| Township / Ward | Savannah |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Thomas | Daughter | — | 20 | ~1920 |
| Betty Thomas | Daughter | — | 17 | ~1923 |
| Mary Thomas | Daughter | — | 22 | ~1918 |
| Mark Thomas | Head | — | 53 | ~1887 |
| Mark Thomas | Son | — | 15 | ~1925 |
| Louise Thomas | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Chatham, Georgia
Daughter, age 2
Chatham, Georgia · implied b. ~1918 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Georgia |
| Father's Birthplace | Georgia |
| Mother's Birthplace | Florida |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
1930
Chatham, Georgia
Daughter, age 12
Chatham, Georgia · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Georgia |
| Father's Birthplace | Georgia |
| Mother's Birthplace | Georgia |
| Can Read/Write | Yes |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
1940
Chatham-County, Georgia
Daughter, age 22
Chatham-County, Georgia · implied b. ~1918 — 6 household members
| Surname | Thomas |
| Given Name | Mary L. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Georgia |
| 1935 Residence (City) | Savannah |
| 1935 Residence (County) | Chatham |
| Class of Worker | 0 |
| Highest Grade | C 2 |
| 1935 Residence | Same Place |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
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 Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Thomas (~0.92 confidence) and father Mark Thomas (~0.92 confidence) and father Mark Thomas (~0.92 confidence) and mother Louise Thomas (~0.92 confidence) and mother Lela Thomas (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Thomas
b. ~1896
Source father
● Household
· direct · ~0.92
Father
Mark Thomas
b. ~1887
Source father
● Household
· direct · ~0.92
Father
Mark Thomas
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Louise Thomas
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Lela Thomas
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Thomas
Daughter · 1940 · age 22 · b. ~1918 · Georgia
★ You are viewing this record
Sibling
Mark Thomas
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Thomas
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Thomas
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 — Chatham-County, Georgia
Open full size
1940 US Federal Census — Chatham-County, Georgia
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00652-00500)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Kaylene Earnest | 9 | niece | — | Georgia |
| 2 | Elzy Durkins | 34 | Head | Clerk | Alabama |
| 3 | Alice Durkins | 33 | wife | — | Kentucky |
| 4 | James Durkins | 10 | son | — | Georgia |
| 5 | Jo Ann Durkins | 5 | daughter | — | Georgia |
| 6 | Mark W. Thomas | 53 | Head | Auditor | Georgia |
| 7 | Louise Thomas | 48 | wife | — | Georgia |
| 8 | Mary L. Thomas THIS PERSON | 22 | daughter | — | Georgia |
| 9 | Dorothy L. Thomas | 20 | daughter | — | Georgia |
| 10 | Betty J. Thomas | 17 | daughter | — | Georgia |
| 11 | Mark W. Jr. Thomas | 15 | son | — | Georgia |
| 12 | Charles G. Earnest | 65 | Head | Pastor | Georgia |
| 13 | Sally Earnest | 65 | wife | — | Georgia |
| 14 | Earl C. Earnest | 35 | son | Delivery Clerk | Georgia |
| 15 | Nelida Earnest | 30 | daughter | — | Georgia |
| 16 | Abner D. Halpern | 43 | Head | Clerk | Georgia |
| 17 | Glad S. Halpern | 45 | wife | Saleslady | Georgia |
| 18 | Marion Halpern | 53 | sister | — | Georgia |
| 19 | Edward H. Halpern | 39 | brother | Guard | Georgia |
| 20 | Kathleen Lennon | 23 | niece | Secretary | Georgia |
| 21 | John H. Jr. Ackley | 38 | Head | Salesman | Alabama |
| 22 | Margaret Ackley | 36 | wife | — | Indiana |
| 23 | Mary H. Jr. Ackley | 12 | son | — | Alabama |
| 24 | Gussie M. Dunigan | 66 | mother | — | Indiana |
| 25 | W. W. Dampier | 73 | Head | — | Georgia |
| 26 | Frances M. Dampier | 72 | wife | — | Georgia |
| 27 | Mary Dampier | 30 | daughter | — | Georgia |
| 28 | William H. Fleetwood | 60 | Head | Master Mariner | Georgia |
| 29 | William H. Jr. Fleetwood | 33 | son | Pilot | Georgia |
| 30 | Herbert G. Fleetwood | 25 | son | — | Georgia |
| 31 | John M. Harmon | 52 | Head | Owner | Georgia |
| 32 | Esther S. Harmon | 40 | wife | — | Georgia |
| 33 | Dora Lee Harmon | 21 | daughter | — | Georgia |
| 34 | Jack Harmon | 12 | son | — | Georgia |
| 35 | Mary Frances Harmon | 9 | daughter | — | Georgia |
| 36 | Gertrude Harmon | 50 | sister | — | New York |
| 37 | Robert D. Daugherty | 46 | Head | Vice President | Virginia |
| 38 | Ivey Daugherty | 37 | wife | — | Mississippi |
| 39 | L. Moriarty | 66 | mother-in-law | — | Mississippi |
Pedigree Summary
Mary + 3 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 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)