RD
Robert Douglas — 1930 US Census Record
Model Tree available1930 United States Federal Census · Rock Island, Illinois
Our Model Tree links this Robert Douglas across the 1920, 1930 and 1940 US Censuses in Rock Island, Illinois (XGBoost, ~Confirmed), with identified parents R & Ralph — first a son (b.~1914), then head of a 5-person household.
Age 16
b. ~1914
Male
Son
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Rock Island, Illinois |
| Surname | Douglas |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Moline City |
| Est. Birth Year | ~1914 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Marion Douglas | Daughter | — | 18 | ~1912 |
| Robert Douglas | Son | — | 16 | ~1914 |
| R Douglas | Head | — | 56 | ~1874 |
| Phoebe Douglas | Daughter | — | 13 | ~1917 |
| Fannie Douglas | Other | — | 55 | ~1875 |
Census Appearances
1920
Rock Island, …
Son, age 6
Rock Island, Illinois · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Douglas |
| Given Name | Robert J. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Rock Island, …
Son, age 16
Rock Island, Illinois · implied b. ~1914 — 5 household members
| Surname | Douglas |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Rock-Island-County, Illinois
Son, age 26
Rock-Island-County, Illinois · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Douglass |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Moline city |
| 1935 Residence (County) | Rock Island |
| Occupation | Accountant |
| Industry | Lumber Company |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1144 |
| Highest Grade | C-4 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Robert Douglas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father R Douglas (~0.92 confidence) and father Ralph Douglass (~0.92 confidence) and mother Fannie Douglass (~0.92 confidence) and mother Fanny Douglas (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
R Douglas
b. ~1874
Source father
● Household
· direct · ~0.92
Father
Ralph Douglass
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Fannie Douglass
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Fanny Douglas
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Douglas
Son · 1930 · age 16 · b. ~1914 · Illinois
★ You are viewing this record
Sibling
Phoebe Douglas
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marion Douglas
Sibling · 1930 · 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
1930 US Federal Census — Rock Island, Illinois
Open full size
1930 US Federal Census — Rock Island, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel553:0112)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Clara M Martin | 50 | Wife-H | — | Iowa |
| 2 | John Alvin Martin | 22 | Son | — | Illinois |
| 3 | M O Mcdonnell | 39 | Head | Engineer | Illinois |
| 4 | Edna Mcdonnell | 39 | Wife-H | Salesman | Kansas |
| 5 | Morgan B Mcdonnell | 15 | Son | — | Illinois |
| 6 | Virginia Mcdonnell | 10 | Daughter | — | Illinois |
| 7 | Arthur L Long | 37 | Head | Organ Builder | Illinois |
| 8 | Jennie V Long | 44 | Wife-H | — | Illinois |
| 9 | Arthur Johnson | 45 | Head | Carpenter | Illinois |
| 10 | Margaret R Johnson | 44 | Wife-H | — | Nebraska |
| 11 | Harold A Johnson | 18 | Son | Carpenter | Illinois |
| 12 | Darlene Johnson | 14 | Daughter | — | Illinois |
| 13 | Clarence Wardlow | 37 | Head | Drop Hammer | Iowa |
| 14 | Zella Wardlow | 35 | Wife-H | — | Michigan |
| 15 | Beulah Wardlow | 16 | Daughter | — | Iowa |
| 16 | Lucille Wardlow | 14 | Daughter | — | Iowa |
| 17 | Edith Wardlow | 12 | Daughter | — | Iowa |
| 18 | Nellie Wardlow | 8 | Daughter | — | Iowa |
| 19 | Anna Kasper | 27 | Boarder | Saleslady | Kentucky |
| 20 | Kenneth Aukerman | 20 | Head | Trucker | Iowa |
| 21 | Kittie Aukerman | 19 | Wife-H | — | Iowa |
| 22 | Luther Frederickson | 44 | Head | Repair | Illinois |
| 23 | Stella V Frederickson | 44 | Wife-H | — | Iowa |
| 24 | Virginia Frederickson | 14 | Daughter | — | Illinois |
| 25 | Willard Frederickson | 13 | Son | — | Michigan |
| 26 | Millard Yeager | 43 | Head | Painter | Illinois |
| 27 | Hazel H Yeager | 40 | Wife-H | — | Iowa |
| 28 | Wilbur A Yeager | 19 | Son | Sheet Metal Worker | Iowa |
| 29 | Ransom R Yeager | 15 | Son | — | Illinois |
| 30 | Doris D Yeager | 13 | Daughter | — | Illinois |
| 31 | Herman Housboen | 28 | Head | — | Illinois |
| 32 | Marguerite Housboen | 24 | Wife-H | — | Illinois |
| 33 | Hudson Housboen | 2 | Son | — | Illinois |
| 34 | Marie Peterson | 22 | Sister-in-law | — | Illinois |
| 35 | R G Douglas | 56 | Head | Instructor | Missouri |
| 36 | Fannie G Douglas | 55 | Wife-H | — | Illinois |
| 37 | Marion G Douglas | 18 | Daughter | — | Illinois |
| 38 | Robert Douglas THIS PERSON | 16 | Son | — | Illinois |
| 39 | Phoebe Douglas | 13 | Daughter | — | Ohio |
| 40 | Walter Hauk | 47 | Head | Machinist | Illinois |
| 41 | Grace Hauk | 39 | Wife-H | — | Illinois |
| 42 | Hugh Hauk | 17 | Son | — | Illinois |
| 43 | Clara Hauk | 9 | Daughter | — | Illinois |
| 44 | Billy Hauk | 4 | Son | — | Illinois |
| 45 | Joe H Wood | 42 | Boarder | — | Illinois |
| 46 | Herman Dahlquist | 46 | Head | Purchaser | Sweden |
| 47 | Agnes M Dahlquist | 41 | Wife-H | — | Sweden |
| 48 | Marian E Dahlquist | 14 | Daughter | — | Illinois |
| 49 | Annabelle Dahlquist | 12 | Daughter | — | Illinois |
| 50 | Henry Junior Dahlquist | 5 | Son | — | Illinois |
Pedigree Summary
Robert + 2 siblings
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 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)