GJ
George Jacobs — 1940 US Census Record
Model Tree available1940 United States Federal Census · Leavenworth-County, Kansas
Our Model Tree links this George Jacobs across the 1920, 1930 and 1940 US Censuses in Leavenworth-County, Kansas (XGBoost, ~Confirmed), with identified parents August & Frank — first a son (b.~1907), then head of a 4-person household.
Age 33
b. ~1907
Male
Son
Born: Kansas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Leavenworth-County, Kansas |
| Surname | Jacobs |
| Given Name | George |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | Delaware Township |
| 1935 Residence (County) | Leavenworth |
| Additional Details | |
| Occupation | Sheet metal worker |
| Industry | Columbia Steel Works |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 943 |
| Highest Grade | No |
| 1935 Residence | Same house |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Occupation | Sheet Metal Worker |
| Township / Ward | Delaware Township |
| Est. Birth Year | ~1907 |
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 1940 census.
| Name | Relation to head | Relative to George | Age | Birth yr |
|---|---|---|---|---|
| August Jacobs | Head | — | 66 | ~1874 |
| Walter Jacobs | Son | — | 28 | ~1912 |
| George Jacobs | Son | — | 33 | ~1907 |
| Edna Jacobs | Other | — | 31 | ~1909 |
Census Appearances
1920
Wyandotte, Kansas
Son, age 13
Wyandotte, Kansas · implied b. ~1907 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | George |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Kansas |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1930
Wyandotte, Kansas
Son, age 22
Wyandotte, Kansas · implied b. ~1908 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | George |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Kansas |
| Age at First Marriage | 19 |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Kansas |
| Occupation | Mechanic |
| Industry | Box Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Leavenworth-County, Kansas
Son, age 33
Leavenworth-County, Kansas · implied b. ~1907 — 4 household members
| Surname | Jacobs |
| Given Name | George |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | Delaware Township |
| 1935 Residence (County) | Leavenworth |
| Occupation | Sheet metal worker |
| Industry | Columbia Steel Works |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 943 |
| Highest Grade | No |
| 1935 Residence | Same house |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 George Jacobs across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father August Jacobs (~0.92 confidence) and father Frank Jacobs (~0.92 confidence) and father Joe Jacobs (~0.92 confidence) and mother L Jacobs (~0.92 confidence) and mother Pearl Jacobs (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
August Jacobs
b. ~1874
Source father
● Household
· direct · ~0.92
Father
Frank Jacobs
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Joe Jacobs
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
L Jacobs
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Pearl Jacobs
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
George Jacobs
Son · 1940 · age 33 · b. ~1907 · Kansas
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Sibling
Walter Jacobs
Sibling · 1940 · age 28
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 — Leavenworth-County, Kansas
Open full size
1940 US Federal Census — Leavenworth-County, Kansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01240-00063)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Sarah Nichols | 75 | Mother | — | Kansas |
| 2 | Alice Groh | 56 | Head | Farmer | Kansas |
| 3 | Earl L. Groh | 22 | Son | Farm Laborer | Kansas |
| 4 | Hannah Reif | 54 | Sister | — | Kansas |
| 5 | Samuel Hoffman | 87 | Lodger | — | Poland |
| 6 | William Schneider | 41 | Head | Farmer | Kansas |
| 7 | Robert Martin | 33 | Lodger | Farm Laborer | Kansas |
| 8 | Frank Erickson | 74 | Head | Laborer | Sweden |
| 9 | Clara Erickson | 77 | Wife | — | Sweden |
| 10 | Frank Freeman | 26 | Head | Laborer | Missouri |
| 11 | Pauline Freeman | 20 | Wife | — | Kansas |
| 12 | Frank Freeman | 2 | Son | — | Kansas |
| 13 | Edwin L. Tracey | 49 | Head | Painter | Kansas |
| 14 | Hazel M. Tracey | 41 | Wife | — | Kansas |
| 15 | Russell M. Tracey | 19 | Son | Paper Hanger | Oklahoma |
| 16 | Beulah J. Malone | 17 | Stepdaughter | — | Kansas |
| 17 | Thomas A. Malone | 12 | Stepson | — | Kansas |
| 18 | Richard E. Tracey | 2 | Son | — | Kansas |
| 19 | Patricia Ann Tracey | 1 | Daughter | — | Kansas |
| 20 | Joseph Hansahun | 69 | Head | Farmer | Kansas |
| 21 | Theresa Hansahun | 60 | Wife | — | Kansas |
| 22 | Joseph Hansahun | 23 | Son | Plumber | Kansas |
| 23 | Thomas Hansahun | 15 | Grandson | — | Kansas |
| 24 | Albert N. Maduska | 58 | Head | Farmer | Kansas |
| 25 | Donald Maduska | 21 | Son | Electrical Motor | Washington |
| 26 | Eleanor Maduska | 20 | Daughter | — | Washington |
| 27 | Frederick Maduska | 15 | Son | — | Washington |
| 28 | August Jacobs | 66 | Head | Farmer | Germany |
| 29 | Walter Jacobs | 28 | Son | Laborer | Kansas |
| 30 | George Jacobs THIS PERSON | 33 | Son | Sheet Metal Worker | Kansas |
| 31 | Edna Jacobs | 31 | Daughter-in-law | — | Nebraska |
| 32 | Herman Tiedtke | 69 | Head | Farmer | Germany |
| 33 | Louise Tiedtke | 65 | Wife | — | Germany |
| 34 | Mary M. Mathis | 60 | Head | Farmer | Germany |
| 35 | Fred W. Tiedtke | 66 | Head | Farmer | Germany |
| 36 | Eva Nelson | 26 | Daughter | — | Kansas |
| 37 | Andy Nelson | 30 | Son-in-law | Laborer | Kansas |
| 38 | Frank L. Johnston | 57 | Head | Barber | Indiana |
| 39 | Daisy Johnston | 56 | Wife | — | Indiana |
| 40 | Vivian Johnston | 21 | Daughter | Stenographer | Kansas |
Related Census Records
Pedigree Summary
George + 1 sibling
Gen 1 · 5 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)