JT
Jack Thomas — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cerro Gordo, Iowa
Our Model Tree links this Jack Thomas across the 1920 and 1930 US Censuses in Cerro Gordo, Iowa (XGBoost, ~Confirmed) — first a son (b.~1915), then head of a 8-person household.
Age 15
b. ~1915
Male
Son
Born: Iowa
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cerro Gordo, Iowa |
| Surname | Thomas |
| Given Name | Jack |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Additional Details | |
| Occupation | Helper on Farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Helper On Farm |
| Township / Ward | Union Twp |
| Est. Birth Year | ~1915 |
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 1930 census.
| Name | Relation to head | Relative to Jack | Age | Birth yr |
|---|---|---|---|---|
| Christina Thomas | Spouse | — | 44 | ~1886 |
| Chas Thomas | Head | — | 48 | ~1882 |
| Ben Thomas | Son | — | 9 | ~1921 |
| Jack Thomas | Son | — | 15 | ~1915 |
| Chas Thomas | Son | — | 18 | ~1912 |
| Marie Thomas | Daughter | — | 20 | ~1910 |
| David Thomas | Son | — | 7 | ~1923 |
| Wendel Thomas | Son | — | 13 | ~1917 |
Census Appearances
1920
Cerro Gordo, …
Son, age 5
Cerro Gordo, Iowa · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Jack |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Cerro Gordo, …
Son, age 15
Cerro Gordo, Iowa · implied b. ~1915 — 8 household members
| Surname | Thomas |
| Given Name | Jack |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Helper on Farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 (1920 and 1930) in Cerro Gordo, Iowa, using XGBoost record linkage.
Show:
This person
Anchor record
Jack Thomas
Son · 1930 · age 15 · b. ~1915 · Iowa
★ You are viewing this record
Sibling
Chas Thomas
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wendel Thomas
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Thomas
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ben Thomas
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Thomas
Sibling · 1930 · age 7
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
1930 US Federal Census — Cerro Gordo, Iowa
Open full size
1930 US Federal Census — Cerro Gordo, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel648:0294)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Iona Emswiler | 10 | Daughter | — | Iowa |
| 52 | John Emswiler | 4 | Son | — | Iowa |
| 53 | Theodore Nelson | 23 | Head | Farmer | Iowa |
| 54 | Guona Nelson | 26 | Wife | — | Iowa |
| 55 | Iola Nelson | 5 | Daughter | — | Iowa |
| 56 | Richard Nelson | 3 | Son | — | Iowa |
| 57 | Robert Nelson | 2 | Son | — | Iowa |
| 58 | Nelson | 0 | Son | — | Iowa |
| 59 | Carl Nelson | 61 | Head | Farmer | Denmark |
| 60 | Agie Nelson | 61 | Wife | — | Denmark |
| 61 | Charlie Nelson | 20 | Son | Laborer | Iowa |
| 62 | Willie Nelson | 18 | Son | Laborer | Iowa |
| 63 | John Schultz | 34 | Head | Farmer | Germany |
| 64 | Adeline Schultz | 28 | Wife | — | Germany |
| 65 | Walter Schultz | 2 | Son | — | Iowa |
| 66 | Marius Nielsen | 41 | Head | Farmer | Denmark |
| 67 | Olga Nielsen | 40 | Wife | — | Iowa |
| 68 | Eveline Nielsen | 13 | Daughter | — | Iowa |
| 69 | Elsie Nielsen | 13 | Daughter | — | Iowa |
| 70 | Lloyd Nielsen | 3 | Son | — | Iowa |
| 71 | Floyd Nielsen | 3 | Son | — | Iowa |
| 72 | C. C. Miller | 41 | Head | Farmer | Poland |
| 73 | Cora Miller | 38 | Wife | — | Iowa |
| 74 | Alvin Miller | 9 | Son | — | Iowa |
| 75 | D. C. Gracey | 52 | Head | Laborer | Iowa |
| 76 | Edwin York | 29 | Head | Farmer | Iowa |
| 77 | Nettie York | 28 | Wife | — | Iowa |
| 78 | Nell Kennedy | 40 | Boarder | Teacher | Iowa |
| 79 | Chas Thomas | 48 | Head | Farmer | Germany |
| 80 | Christina Thomas | 44 | Wife | — | Germany |
| 81 | Marie Thomas | 20 | Daughter | Farm Helper | Illinois |
| 82 | Chas Thomas | 18 | Son | Helper On Farm | Iowa |
| 83 | Jack Thomas THIS PERSON | 15 | Son | Helper On Farm | Iowa |
| 84 | Wendel Thomas | 13 | Son | — | Iowa |
| 85 | Ben Thomas | 9 | Son | — | Iowa |
| 86 | David Thomas | 7 | Son | — | Iowa |
| 87 | Geo Mahr | 50 | Head | Farmer | Wisconsin |
| 88 | Frederick Mahr | 35 | Wife | — | Iowa |
| 89 | Myrtle B Mahr | 8 | Daughter | — | Iowa |
| 90 | Charlie Lang | 49 | Head | Farmer | Missouri |
| 91 | Dora Lang | 43 | Wife | — | Iowa |
| 92 | Alice E Lang | 11 | Daughter | — | Missouri |
| 93 | Eva L Lang | 8 | Daughter | — | Missouri |
| 94 | Carl Martin | 50 | Head | Farmer | Iowa |
| 95 | Sylvan Johnson | 31 | Head | Farmer | Illinois |
| 96 | Hazel Johnson | 31 | Wife | — | Iowa |
| 97 | Johnson | 5 | Son | — | Iowa |
| 98 | Eugene Johnson | 5 | Son | — | Iowa |
| 99 | Norda Johnson | 2 | Daughter | — | Iowa |
| 100 | Earl Huff | 23 | Hired Man | Laborer | Missouri |
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)