DT
David Thomas — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Polk, Iowa
Our Model Tree links this David Thomas across the 1920, 1930 and 1940 US Censuses in Polk, Iowa (XGBoost, ~Confirmed) — first a head (b.~1868), then head of a 5-person household.
Age 62
b. ~1868
Male
Head
Born: Wales
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Polk, Iowa |
| Surname | Thomas |
| Given Name | David G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Wales |
| Naturalization Status | Naturalized |
| Year of Immigration | 1872 |
| Age at First Marriage | 23 |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Additional Details | |
| Occupation | Night Watchman |
| Industry | Laundry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | $35 |
| Radio Set | R |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
| Occupation | Night Watchman |
| Township / Ward | Des Moines |
| Est. Birth Year | ~1868 |
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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to David | Age | Birth yr |
|---|---|---|---|---|
| Sarah Thomas | Daughter | — | 28 | ~1902 |
| Sarah Thomas | Daughter | — | 34 | ~1896 |
| David Thomas | Head | — | 62 | ~1868 |
| David Thomas | Son | — | 21 | ~1909 |
| Sarah Thomas | Spouse | — | 58 | ~1872 |
Census Appearances
1920
Appanoose, Iowa
Head, age 52
Appanoose, Iowa · implied b. ~1868 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Wales |
| Year of Immigration | 1882 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Occupation | Miner |
| Industry | Coal Mine |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Welsh |
| Home Owned/Rented | R |
| Birth Country | Wales |
| Year of Naturalization | 1880 |
| Birthplace (normalized) | wales |
1930
Polk, Iowa
Head, age 62
Polk, Iowa · implied b. ~1868 — 5 household members
| Surname | Thomas |
| Given Name | David G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Wales |
| Naturalization Status | Naturalized |
| Year of Immigration | 1872 |
| Age at First Marriage | 23 |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Occupation | Night Watchman |
| Industry | Laundry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | $35 |
| Radio Set | R |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
1940
Polk-County, Iowa
Other, age 73
Polk-County, Iowa · implied b. ~1867 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | David G. |
| Relationship to Head | Lodger |
| Sex | M |
| Color / Race | White |
| Age | 73 |
| Marital Status | Widowed |
| Birthplace | Wales |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Naturalization Status | Naturalized |
| Occupation | Custodian |
| Industry | Church |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 780 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
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 David Thomas across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
David Thomas
Head · 1930 · age 62 · b. ~1868 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Polk, Iowa
Open full size
1930 US Federal Census — Polk, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel674:0997)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | David G. Thomas THIS PERSON | 62 | Head | Night Watchman | Wales |
| 2 | Sarah J. Thomas | 58 | Wife | — | Wales |
| 3 | David Jr. Thomas | 21 | Son | Employee | Iowa |
| 4 | Sarah Thomas | 34 | Daughter | Social Worker | Iowa |
| 5 | Sarah J. Thomas | 28 | Daughter | Stenographer | Iowa |
| 6 | Paul W. Hines | 45 | Head | Superintendent | Iowa |
| 7 | Katherine J. Hines | 44 | Wife | — | Iowa |
| 8 | Stanley Hines | 19 | Son | Salesman | Iowa |
| 9 | Adeline G. Hines | 17 | Daughter | Student | Iowa |
| 10 | Gayle E. Hines | 8 | Daughter | Student | Iowa |
| 11 | Earle E. Phoenix | 19 | Roomer | Truck Driver | Iowa |
| 12 | Virgil E. Gershan | 29 | Roomer | Truck Driver | Iowa |
| 13 | Roy Baker | 34 | Roomer | Car Washer | Iowa |
| 14 | Ralph Clark | 22 | Roomer | Elevator Oper. | Iowa |
| 15 | Gottlieb Knox | 54 | Head | Mechanic | Germany |
| 16 | Charlotte Knox | 41 | Wife | — | England |
| 17 | Juliana Knox | 12 | Daughter | Student | Iowa |
| 18 | George Hervelin | 44 | Head | Teamster | Iowa |
| 19 | Violet H. Hervelin | 25 | Sister | Clerk | Iowa |
| 20 | Alma G. Johnson | 37 | Roomer | Nurse | Sweden |
| 21 | Walter S. Nixon | 41 | Head | Carpenter | Missouri |
| 22 | Anna Bell Nixon | 52 | Wife | — | Iowa |
| 23 | Emil Goodman | 62 | Head | — | Indiana |
| 24 | Hattie Bertha Goodman | 59 | Wife | — | Illinois |
| 25 | Harry G. Hertel | 44 | Head | Clerk | Illinois |
| 26 | Elizabeth Hertel | 35 | Sister | Employee | Illinois |
| 27 | Katherine Hertel | 31 | Sister | Clerical | Illinois |
| 28 | Harry Butt | 35 | Head | Clerical | Virginia |
| 29 | Louise Alice Butt | 35 | Wife | Loco. Fireman | Oklahoma |
| 30 | Laura Mcfarland | 40 | Head | — | Iowa |
| 31 | William Tarleton | 32 | Head | Cook | New Jersey |
| 32 | Irene M. Tarleton | 36 | Wife | Employee | Iowa |
| 33 | William Jr. Tarleton | 4 | Son | — | Iowa |
| 34 | Chester O. Hansen | 22 | Head | — | Iowa |
| 35 | Louise M. Hansen | 28 | Wife | Clerk | Iowa |
| 36 | Edward R. Harney | 58 | Head | Janitor | Iowa |
| 37 | Catherine Harney | 52 | Wife | — | Iowa |
| 38 | Mary Rose Harney | 21 | Daughter | Cashier | Iowa |
| 39 | Helen Harney | 19 | Daughter | Stenographer | Iowa |
| 40 | Joe Cheeser | 70 | Servant | Student | Porto Rico |
| 41 | Paul Etters | 31 | Head | Employee | Nebraska |
| 42 | Jessie Etters | 26 | Wife | Mechanic | Nebraska |
| 43 | Harold Etters | 8 | Son | — | Nebraska |
| 44 | Gladys Etters | 5 | Daughter | — | Nebraska |
| 45 | Carl Crumphultz | 64 | Head | — | Virginia |
| 46 | Nellie Crumphultz | 60 | Wife | Motorman | Virginia |
| 47 | Bennett Tollison | 24 | Head | — | S. Dakota |
| 48 | Florence Tollison | 19 | Wife | Laborer | S. Dakota |
| 49 | Hazel Tollison | 1 | Daughter | — | S. Dakota |
| 50 | Marion Mcreardon | 35 | Sister | — | S. Dakota |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)