RJ
Robert Jacobs — 1930 US Census Record
Model Tree available1930 United States Federal Census · Keokuk, Iowa
Our Model Tree links this Robert Jacobs across the 1910, 1920, 1930 and 1940 US Censuses in Keokuk, Iowa (XGBoost, ~Confirmed), with identified parents Claude & George — first a head (b.~1904), then head of a 4-person household.
Age 26
b. ~1904
Male
Head
Born: Iowa
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Keokuk, Iowa |
| Surname | Jacobs |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 22 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Additional Details | |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 23 |
| Radio Set | R |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | West Lancaster Township |
| Est. Birth Year | ~1904 |
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.
4 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Jacobs | Head | — | 26 | ~1904 |
| Frank Jacobs | Son | — | ~1930 | |
| Robert Jacobs | Son | — | 2 | ~1928 |
| Lahue Jacobs | Other | — | 20 | ~1910 |
Census Appearances
1910
Keokuk, Iowa
Son, age 5
Keokuk, Iowa · implied b. ~1905 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1920
Keokuk, Iowa
Son, age 16
Keokuk, Iowa · implied b. ~1904 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| 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
Keokuk, Iowa
Head, age 26
Keokuk, Iowa · implied b. ~1904 — 4 household members
| Surname | Jacobs |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 22 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 23 |
| Radio Set | R |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Keokuk-County, Iowa
Son, age 35
Keokuk-County, Iowa · implied b. ~1905 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | Robert W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Sigourney city |
| 1935 Residence (County) | Keokuk county |
| Occupation | Truck Driver |
| Industry | Milling |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 780 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same house |
| 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 Robert Jacobs across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Claude Jacobs (~0.92 confidence) and father George Jacobs (~0.92 confidence) and father Hugh Jacobs (~0.92 confidence) and mother Agnes Jacobs (~0.92 confidence) and mother Hattie Jacobs (~0.92 confidence) and mother Mary Jacobs (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Claude Jacobs
b. ~1879
Source father
● Household
· direct · ~0.92
Father
George Jacobs
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Hugh Jacobs
b. ~1857
Source father
● Household
· direct · ~0.92
Mother
Agnes Jacobs
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Hattie Jacobs
b. ~1859
Source mother
● Household
· direct · ~0.92
Mother
Mary Jacobs
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Jacobs
Head · 1930 · age 26 · b. ~1904 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Keokuk, Iowa
Open full size
1930 US Federal Census — Keokuk, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel662:0950)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Sophia J Merk | 51 | Head | Teacher | Iowa |
| 2 | William Holland Merk | 30 | Brother | Laborer | Iowa |
| 3 | Robert Jacobs THIS PERSON | 26 | Head | Farmer | Iowa |
| 4 | Lahue Jacobs | 20 | Wife-H | — | Iowa |
| 5 | Robert Lee Jacobs | 2 | Son | — | Iowa |
| 6 | Frank Claude Jacobs | 0 | Son | — | Iowa |
| 7 | Geo. Wilkening | 49 | Head | Farmer | Kansas |
| 8 | Betty Wilkening | 42 | Wife-H | — | Iowa |
| 9 | W. H. Wilkening | 47 | Head | Farmer | Kansas |
| 10 | Florence Wilkening | 49 | Wife-H | — | Iowa |
| 11 | Dale Wilkening | 20 | Son | — | Iowa |
| 12 | Alma Wilkening | 16 | Daughter | — | Iowa |
| 13 | Ray Wilkening | 14 | Son | — | Iowa |
| 14 | Lura Wilkening | 10 | Daughter | — | Iowa |
| 15 | Wm Wilkening | 8 | Son | — | Iowa |
| 16 | Fred W. Wilkening | 50 | Head | Farmer | Kansas |
| 17 | A. L. Utterback | 57 | Head | Farmer | Iowa |
| 18 | Maudie Utterback | 50 | Wife-H | — | Iowa |
| 19 | Hazel Utterback | 27 | Daughter | — | Iowa |
| 20 | Daisy Utterback | 20 | Daughter | — | Iowa |
| 21 | S. D. Pennington | 80 | Father-in-law | — | Iowa |
| 22 | Chester H. Utterback | 35 | Head | Farmer | Iowa |
| 23 | Martha E Utterback | 39 | Wife-H | — | Iowa |
| 24 | Hazel Louise Utterback | 7 | Daughter | — | Iowa |
| 25 | Alan Ivan Utterback | 5 | Son | — | Iowa |
| 26 | Betty E. Utterback | 1 | Daughter | — | Iowa |
| 27 | Claude Martin | 41 | Head | Farmer | Missouri |
| 28 | Ada Martin | 38 | Wife-H | — | Iowa |
| 29 | Ralph Martin | 15 | Son | — | Iowa |
| 30 | Ray Martin | 13 | Son | — | Iowa |
| 31 | Ruth Martin | 11 | Daughter | — | Iowa |
| 32 | Wm De Young | 21 | Hired man | Laborer | Iowa |
| 33 | Chas L. Pollock | 46 | Head | Farmer | Iowa |
| 34 | Zadie Pollock | 39 | Wife-H | — | Iowa |
| 35 | Helena Pollock | 16 | Daughter | — | Iowa |
| 36 | Claudine Pollock | 12 | Daughter | — | Iowa |
| 37 | Fern Pollock | 10 | Daughter | — | Iowa |
| 38 | Ilo Herkove | 18 | Hired man | Laborer | Iowa |
| 39 | Polly Frush | 86 | Mother | — | Indiana |
| 40 | Elmer Jacobs | 45 | Head | Farmer | Iowa |
| 41 | Maggie Jacobs | 47 | Wife-H | — | Iowa |
| 42 | Eugene Jacobs | 19 | Son | Laborer | Iowa |
| 43 | Jennie Jacobs | 12 | Daughter | — | Iowa |
| 44 | L. A. Slaw | 40 | Head | Farmer | Iowa |
| 45 | Arza Slaw | 38 | Wife-H | — | Missouri |
| 46 | Wilbur Slaw | 15 | Son | — | Iowa |
| 47 | Wayne Slaw | 11 | Son | — | Iowa |
| 48 | Arlene Slaw | 8 | Daughter | — | Iowa |
| 49 | John Lansell | 33 | Hired man | Laborer | Germany |
| 50 | John Kelley | 48 | Head | Farmer | Iowa |
Pedigree Summary
Robert
Gen 1 · 6 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)