JU
John Underwood — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Florida
Our Model Tree links this John Underwood across the 1930 and 1940 US Censuses in Polk-County, Florida (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 8-person household.
Age 20
b. ~1920
Male
Son
Born: Alabama
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Florida |
| Surname | Underwood |
| Given Name | John L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | Frostproof Town |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Laborer |
| Industry | Canning Plant |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 384 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Occupation | Laborer |
| Township / Ward | Frostproof Town |
| Est. Birth Year | ~1920 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Nathan Underwood | Son | — | 14 | ~1926 |
| James Underwood | Son | — | 25 | ~1915 |
| Lula Underwood | Head | — | 45 | ~1895 |
| Rochelle Underwood | Daughter | — | 16 | ~1924 |
| Edna Underwood | Daughter | — | 5 | ~1935 |
| Vonciel Underwood | Daughter | — | 23 | ~1917 |
| John Underwood | Son | — | 20 | ~1920 |
| Oscar Underwood | Son | — | 27 | ~1913 |
Census Appearances
1930
Polk, Florida
Other, age 9
Polk, Florida · implied b. ~1921 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Underwood |
| Given Name | J. D. |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1940
Polk-County, Florida
Son, age 20
Polk-County, Florida · implied b. ~1920 — 8 household members
| Surname | Underwood |
| Given Name | John L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | Frostproof Town |
| 1935 Residence (County) | Polk |
| Occupation | Laborer |
| Industry | Canning Plant |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 384 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
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 Underwood across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Underwood
Son · 1940 · age 20 · b. ~1920 · Florida
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Sibling
Edna Underwood
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Underwood
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nathan Underwood
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Oscar Underwood
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rochelle Underwood
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vonciel Underwood
Sibling · 1940 · age 23
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 — Polk-County, Florida
Open full size
1940 US Federal Census — Polk-County, Florida
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00613-00389)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marie Jenkins | 5 | Daughter | — | Florida |
| 2 | Joel Jenkins | 3 | Son | — | Florida |
| 3 | Eideau Jenkins | 0 | Daughter | — | Florida |
| 4 | Maggie Mcswain | 56 | Mother-in-law | — | Alabama |
| 5 | Melinda Irving | 63 | Agent | Housekeeper | Alabama |
| 6 | Esther E. Smith | 32 | Head | Truck Driver | Alabama |
| 7 | Deborah Smith | 35 | Wife | — | Alabama |
| 8 | Dorothy Smith | 13 | Daughter | — | Alabama |
| 9 | Wayne Smith | 11 | Son | — | Texas |
| 10 | Raymond Smith | 1 | Son | — | Florida |
| 11 | Silvio Festi | 28 | Head | Juicer | Texas |
| 12 | Abbie Jean Festi | 29 | Wife | Sectionizer | Alabama |
| 13 | Evelyn Festi | 7 | Daughter | — | Texas |
| 14 | Evelyn Festi | 5 | Daughter | — | Florida |
| 15 | Ellis L. Swafford | 33 | Head | Fruit Picker | Louisiana |
| 16 | Bertie Swafford | 28 | Wife | — | Florida |
| 17 | Mildred Swafford | 2 | Daughter | — | Florida |
| 18 | James H. Newton | 60 | Head | Laborer | Alabama |
| 19 | Bonnie Newton | 50 | Wife | — | Alabama |
| 20 | Grace Newton | 19 | Daughter | Sectionizer | Alabama |
| 21 | Lula Underwood | 45 | Head | — | Alabama |
| 22 | Oscar V. Underwood | 27 | Son | Fruit Picker | Alabama |
| 23 | James D. Underwood | 25 | Son | Juicer | Alabama |
| 24 | Vonciel Underwood | 23 | Daughter | Sectionizer | Alabama |
| 25 | John L. Underwood THIS PERSON | 20 | Son | Laborer | Alabama |
| 26 | Rochelle Underwood | 16 | Daughter | — | Alabama |
| 27 | Nathan Underwood | 14 | Son | — | Alabama |
| 28 | Edna R. Underwood | 5 | Daughter | — | Florida |
| 29 | Harvey Conner | 29 | Head | Laborer | Alabama |
| 30 | Maybelle Conner | 25 | Wife | Sectionizer | Alabama |
| 31 | Dorothy May Conner | 4 | Daughter | — | Florida |
| 32 | James C. Conner | 2 | Son | — | Florida |
| 33 | Neely Bracken | 50 | Head | Fruit Picker | Alabama |
| 34 | Hale Bracken | 45 | Wife | Sectionizer | Alabama |
| 35 | Hulette Bracken | 17 | Daughter | — | Alabama |
| 36 | Eddie R. Bracken | 9 | Son | — | Alabama |
| 37 | Andrew A. Brack | 40 | Head | Laborer | Georgia |
| 38 | Josephine Brack | 35 | Wife | — | Alabama |
| 39 | Eunice Brack | 16 | Daughter | — | Alabama |
| 40 | Era May Brack | 13 | 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)