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Thelma Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Loudoun-County, Virginia
Our Model Tree links this Thelma Johnson across the 1930 and 1940 US Censuses in Loudoun-County, Virginia (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 12-person household.
Age 18
b. ~1922
Female
Daughter
Born: Virginia
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Loudoun-County, Virginia |
| Surname | Johnson |
| Given Name | Thelma |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Virginia |
| 1935 Residence (City) | Jefferson Dist |
| 1935 Residence (County) | Loudoun |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
| Township / Ward | Jefferson Dist |
| Est. Birth Year | ~1922 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thelma | Age | Birth yr |
|---|---|---|---|---|
| Edith Johnson | Daughter | — | 10 | ~1930 |
| Bertha Johnson | Daughter | — | 10 | ~1930 |
| Thelma Johnson | Daughter | — | 18 | ~1922 |
| Lucy Johnson | Daughter | — | 23 | ~1917 |
| Elizabeth Johnson | Daughter | — | 15 | ~1925 |
| Leola Johnson | Daughter | — | 16 | ~1924 |
| John Johnson | Head | — | 54 | ~1886 |
| Milton Johnson | Son | — | 22 | ~1918 |
| Lawrence Johnson | Son | — | 12 | ~1928 |
| Raymon Johnson | Son | — | 7 | ~1933 |
| Clayton Johnson | Son | — | 18 | ~1922 |
| Grace Johnson | Spouse | — | 42 | ~1898 |
Census Appearances
1930
Loudoun, Virginia
Other, age 8
Loudoun, Virginia · implied b. ~1922 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Thelma R |
| Relationship to Head | Niece |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1940
Loudoun-County, Virginia
Daughter, age 18
Loudoun-County, Virginia · implied b. ~1922 — 12 household members
| Surname | Johnson |
| Given Name | Thelma |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Virginia |
| 1935 Residence (City) | Jefferson Dist |
| 1935 Residence (County) | Loudoun |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
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 Thelma Johnson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Thelma Johnson
Daughter · 1940 · age 18 · b. ~1922 · Virginia
★ You are viewing this record
Sibling
Edith Johnson
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leola Johnson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymon Johnson
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Milton Johnson
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucy Johnson
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bertha Johnson
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Johnson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Johnson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clayton Johnson
Sibling · 1940 · age 18
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 — Loudoun-County, Virginia
Open full size
1940 US Federal Census — Loudoun-County, Virginia
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-04274-00185)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frances D Patrick | 32 | Wife | — | Nebraska |
| 2 | Arthur C Patrick | 3 | Son | — | Nebraska |
| 3 | Allen C Reed | 23 | Head | Gardner | Virginia |
| 4 | Opal G Reed | 20 | Wife | — | Virginia |
| 5 | Peggy A Reed | 0 | Daughter | — | Virginia |
| 6 | Samuel O'Sullivan | 36 | Head | Farm Manager | Kentucky |
| 7 | Ruth N O'Sullivan | 32 | Wife | — | Maryland |
| 8 | Patricia R O'Sullivan | 3 | Daughter | — | Virginia |
| 9 | Leonard Putman | 34 | Head | Farm Hand | Virginia |
| 10 | Caroline Putman | 31 | Wife | — | Virginia |
| 11 | Edna L Putman | 13 | Daughter | — | Virginia |
| 12 | Helen A Putman | 7 | Daughter | — | Virginia |
| 13 | Frances E Putman | 2 | Daughter | — | Virginia |
| 14 | Tasker A Marsteller | 52 | Head | Operator | Virginia |
| 15 | Jessie Marsteller | 51 | Wife | — | Virginia |
| 16 | Thomas F Cornwell | 64 | Head | Operator | Virginia |
| 17 | Robert K Cornwell | 38 | Son | Helper | Virginia |
| 18 | Mae B Cornwell | 28 | Wife | — | South Carolina |
| 19 | Raymon E Cornwell | 9 | Son | — | Virginia |
| 20 | James F Cornwell | 5 | Son | — | Virginia |
| 21 | Thomas Corbin | 19 | Farm hand | Farm Hand | Virginia |
| 22 | George H Wells | 57 | Head | Caretaker | Pennsylvania |
| 23 | Henry C Barrett | 73 | Lodger | — | Virginia |
| 24 | John Johnson | 54 | Head | Laborer | Virginia |
| 25 | Grace Johnson | 42 | Wife | — | Virginia |
| 26 | Lucy E Johnson | 23 | Daughter | — | Virginia |
| 27 | Milton Johnson | 22 | Son | Day Laborer | Virginia |
| 28 | Thelma Johnson THIS PERSON | 18 | Daughter | — | Virginia |
| 29 | Clayton Johnson | 18 | Son | Farm Hand | Virginia |
| 30 | Leola Johnson | 16 | Daughter | — | Virginia |
| 31 | Elizabeth Johnson | 15 | Daughter | Maid | Virginia |
| 32 | Lawrence Johnson | 12 | Son | — | Virginia |
| 33 | Edith Johnson | 10 | Daughter | — | Virginia |
| 34 | Bertha Johnson | 10 | Daughter | — | Virginia |
| 35 | Raymon Johnson | 7 | Son | — | Virginia |
| 36 | Josephine Marcellis | 30 | Head | — | Virginia |
| 37 | James Edwd Marcellis | 46 | Son | Laborer | Virginia |
| 38 | Stanley Marcellis | 42 | Son | Laborer | Virginia |
| 39 | Willis Marcellis | 29 | Son | Laborer | Virginia |
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)