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Robert Jacobs — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Scott-County, Iowa
Our Model Tree links this Robert Jacobs across the 1930 and 1940 US Censuses in Scott-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 8-person household.
Age 15
b. ~1925
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Scott-County, Iowa |
| Surname | Jacobs |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport |
| 1935 Residence (County) | Scott |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Davenport |
| Est. Birth Year | ~1925 |
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 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Richard Jacobs | Head | — | 52 | ~1888 |
| Frank Jacobs | Son | — | 22 | ~1918 |
| Alvina Jacobs | Daughter | — | 28 | ~1912 |
| Anna Jacobs | Spouse | — | 55 | ~1885 |
| Robert Jacobs | Son | — | 15 | ~1925 |
| Catherine Jacobs | Daughter | — | 26 | ~1914 |
| Valeria Jacobs | Daughter | — | 20 | ~1920 |
| Richard Jacobs | Son | — | 23 | ~1917 |
Census Appearances
1930
Scott, Iowa
Son, age 5
Scott, Iowa · implied b. ~1925 — 8 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 | Austria |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Scott-County, Iowa
Son, age 15
Scott-County, Iowa · implied b. ~1925 — 8 household members
| Surname | Jacobs |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport |
| 1935 Residence (County) | Scott |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Jacobs
Son · 1940 · age 15 · b. ~1925 · Iowa
★ You are viewing this record
Sibling
Catherine Jacobs
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Jacobs
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Jacobs
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alvina Jacobs
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Valeria Jacobs
Sibling · 1940 · age 20
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
1940 US Federal Census — Scott-County, Iowa
Open full size
1940 US Federal Census — Scott-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01202-00840)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alice Borchess | 36 | wife | — | Iowa |
| 2 | Clarence Borchess | 18 | son | — | Iowa |
| 3 | Jeanette Borchess | 13 | daughter | — | Iowa |
| 4 | Anna Anna | 71 | head | — | Iowa |
| 5 | Emma Anna | 65 | sister | Clerk | Iowa |
| 6 | Bertha Anna | 61 | sister | Teacher | Iowa |
| 7 | Freda Eickelardt | 67 | head | — | Germany |
| 8 | Clarence Eickelardt | 25 | son | Truck Driver | Iowa |
| 9 | Edwin Lindsey | 32 | head | Warehouseman | Iowa |
| 10 | Dorothy Lindsey | 29 | wife | Seamstress | Iowa |
| 11 | Edwin J Lindsey | 8 | son | — | Iowa |
| 12 | Douglas Lindsey | 7 | daughter | — | Iowa |
| 13 | John Friedrichsen | 41 | head | Tool Maker | Germany |
| 14 | Margareta Friedrichsen | 40 | wife | — | Germany |
| 15 | John Friedrichsen | 18 | son | — | Germany |
| 16 | Clara Haas | 51 | head | Teacher | Iowa |
| 17 | Lillian Haas | 49 | sister | Bookkeeper | Iowa |
| 18 | Anna Haas | 47 | sister | — | Iowa |
| 19 | Emil Mundt | 56 | head | Glazer | Iowa |
| 20 | Ella Mundt | 52 | wife | — | Iowa |
| 21 | Frank Bledsoe | 31 | head | Bus Driver | Iowa |
| 22 | Eleanor Bledsoe | 30 | wife | Seamstress | Iowa |
| 23 | Patricia Bledsoe | 7 | daughter | — | Iowa |
| 24 | Fred Hueber | 77 | head | — | Germany |
| 25 | Matilda Hueber | 74 | wife | — | Germany |
| 26 | Henry Hueber | 42 | son | Machinist | Iowa |
| 27 | Alda Stokes | 39 | daughter | — | Iowa |
| 28 | Warren Stokes | 5 | son | — | Iowa |
| 29 | Richard Jacobs | 52 | head | Painter | Iowa |
| 30 | Anna Jacobs | 55 | wife | — | Austria |
| 31 | Alvina Jacobs | 28 | daughter | Binder | Iowa |
| 32 | Catherine Jacobs | 26 | daughter | Bookkeeper | Iowa |
| 33 | Richard Jacobs | 23 | son | Laborer | Iowa |
| 34 | Frank Jacobs | 22 | son | Painter | Iowa |
| 35 | Valeria Jacobs | 20 | daughter | Sewing | Iowa |
| 36 | Robert Jacobs THIS PERSON | 15 | son | — | Iowa |
| 37 | Edwin Otts | 33 | head | Roofer | Iowa |
| 38 | Doris Otts | 24 | wife | — | Kansas |
| 39 | E Fred Otts | 6 | son | — | Iowa |
| 40 | Harold Otts | 4 | son | — | Iowa |
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)