HT
Harry Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Rock-Island-County, Illinois
Our Model Tree links this Harry Thomas across the 1920, 1930 and 1940 US Censuses in Rock-Island-County, Illinois (XGBoost, ~Confirmed), with identified parents Robert & Mary — first a head (b.~1908), then head of a 5-person household.
Age 32
b. ~1908
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Rock-Island-County, Illinois |
| Surname | Thomas |
| Given Name | Harry S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Moline |
| Additional Details | |
| Occupation | Plow Assembler |
| Industry | Plow Mfg Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Ill. |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Plow Assembler |
| Township / Ward | Rock Island Twp |
| Est. Birth Year | ~1908 |
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 1940 census.
| Name | Relation to head | Relative to Harry | Age | Birth yr |
|---|---|---|---|---|
| Harry Thomas | Head | — | 32 | ~1908 |
| Thelma Thomas | Other | — | 2 | ~1938 |
| Robert Thomas | Son | — | 2 | ~1938 |
| James Thomas | Son | — | 4 | ~1936 |
| Reba Thomas | Spouse | — | 24 | ~1916 |
Census Appearances
1920
Scott, Iowa
Son, age 11
Scott, Iowa · implied b. ~1909 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Scott, Iowa
Son, age 21
Scott, Iowa · implied b. ~1909 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | labourer |
| Industry | Construction |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Rock-Island-County, Illinois
Head, age 32
Rock-Island-County, Illinois · implied b. ~1908 — 5 household members
| Surname | Thomas |
| Given Name | Harry S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Moline |
| Occupation | Plow Assembler |
| Industry | Plow Mfg Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Ill. |
| 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 Harry Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Thomas (~0.92 confidence) and mother Mary Thomas (~0.92 confidence) and mother Mary Thomas (~0.92 confidence) and father Robert Thomas (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Thomas
b. ~1847
Source father
● Household
· direct · ~0.92
Mother
Mary Thomas
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Mary Thomas
b. ~1876
Source mother
● Household
· direct · ~0.92
Father
Robert Thomas
b. ~1877
Source father
● Household
· direct · ~0.92
This person
Anchor record
Harry Thomas
Head · 1940 · age 32 · b. ~1908 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Rock-Island-County, Illinois
Open full size
1940 US Federal Census — Rock-Island-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00877-00630)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Merle Wadsworth | 26 | Head | Mill Oper. | Illinois |
| 42 | Golda Wadsworth | 36 | Wife | — | Illinois |
| 43 | Arnold Jorgensen | 42 | Head | Diesel Motor Machinist | Iowa |
| 44 | Rachael Jorgensen | 24 | Wife | — | Illinois |
| 45 | Edward N. Fuller | 26 | Head | Stenographer | Illinois |
| 46 | Doris G. Fuller | 23 | Wife | — | Illinois |
| 47 | Donald R. Fuller | 3 | Son | — | Indiana |
| 48 | Elbert J. Vedder | 41 | Head | Shipping Foreman | Minn. |
| 49 | Beulah Vedder | 36 | Wife | — | Iowa |
| 50 | Lee H. Sydnor | 45 | Head | Park Supt. | Illinois |
| 51 | Bonnie B. Sydnor | 24 | Wife | — | Illinois |
| 52 | Richard L. Sydnor | 11 | Son | — | Illinois |
| 53 | Clyde L. Sydnor | 8 | Son | — | Illinois |
| 54 | Robert Hunt | 32 | Head | Crane Oper. | Illinois |
| 55 | Beulah Hunt | 31 | Wife | Packer | Illinois |
| 56 | Jack R. Sandra | 26 | Head | Wagon Assembler | Iowa |
| 57 | Wilma Sandra | 25 | Wife | — | Miss. |
| 58 | Harry S. Thomas THIS PERSON | 32 | Head | Plow Assembler | Iowa |
| 59 | Reba E. Thomas | 24 | Wife | — | Iowa |
| 60 | James Thomas | 4 | Son | — | Ill. |
| 61 | Robert Thomas | 2 | Son | — | Ill. |
| 62 | Thelma Thomas | 2 | Dau | — | Ill. |
| 63 | John Burkett | 27 | Head | Auto Mechanic | Ill. |
| 64 | Ada Burkett | 20 | Wife | — | Okla. |
| 65 | Beverly M. Burkett | 8 | Dau. | — | Ill. |
| 66 | Guy L. Burkett | 6 | Son | — | Ill. |
| 67 | Francis C. Klaus | 36 | Head | Dry Cleaner | Iowa |
| 68 | Dorothy L. Klaus | 30 | Wife | Presser | Iowa |
| 69 | Harrison Jones | 27 | Head | Block Maker | Iowa |
| 70 | Helen Jones | 22 | Wife | — | Iowa |
| 71 | Myrna J. Jones | 2 | Dau | — | Iowa |
| 72 | Ben Bellinger | 63 | Head | Home Builder | Ill. |
| 73 | Della Bellinger | 65 | Wife | — | Ill. |
| 74 | Earl Bellinger | 40 | Son | Home Builder | Ill. |
| 75 | M. A. Mason | 46 | Head | Machine Oper | Ill. |
| 76 | E. William Skinner | 32 | Head | Truck Driver | Ill. |
| 77 | Harriet Skinner | 31 | Wife | — | Ill. |
| 78 | Jerry Skinner | 6 | Son | — | Ill. |
| 79 | R. Thomas Skinner | 5 | Son | — | Ill. |
| 80 | Alfred A. Skinner | 73 | Father | — | Ill. |
Pedigree Summary
Harry
Gen 1 · 4 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)