MK
Mary Klein — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this Mary Klein across the 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed) — first a spouse (b.~1882), then head of a 10-person household.
Age 58
b. ~1882
Female
Spouse
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Klein |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Industry | 0 |
| Class of Worker | No |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1882 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| William Klein | Son | — | 29 | ~1911 |
| Frank Klein | Son | — | 27 | ~1913 |
| Raymond Klein | Son | — | 18 | ~1922 |
| Cathryn Klein | Daughter | — | 33 | ~1907 |
| Bernadette Klein | Daughter | — | 21 | ~1919 |
| Mary Klein | Spouse | — | 58 | ~1882 |
| Florence Klein | Daughter | — | 25 | ~1915 |
| Peter Klein | Head | — | 64 | ~1876 |
| Antoinette Klein | Daughter | — | 31 | ~1909 |
| John Klein | Son | — | 13 | ~1927 |
Census Appearances
1930
Jefferson, Kentucky
Other, age 48
Jefferson, Kentucky · implied b. ~1882 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Klein |
| Given Name | Margaret |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Kentucky |
| Age at First Marriage | 32 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Spouse, age 58
Jefferson-County, Kentucky · implied b. ~1882 — 10 household members
| Surname | Klein |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Industry | 0 |
| Class of Worker | No |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 Mary Klein across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Klein
Spouse · 1940 · age 58 · b. ~1882 · Kentucky
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Jefferson-County, Kentucky
Open full size
1940 US Federal Census — Jefferson-County, Kentucky
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01367-00249)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Dorothy P Ernst | 15 | Daughter | — | Kentucky |
| 42 | Laverne Ernst | 12 | Daughter | — | Kentucky |
| 43 | Deloris Ernst | 10 | Daughter | — | Kentucky |
| 44 | Anthony Ernst | 8 | Son | — | Kentucky |
| 45 | Francis John Ernst | 6 | Son | — | Kentucky |
| 46 | Robert L. Ernst | 3 | Son | — | Kentucky |
| 47 | Anton L. Graber | 41 | Head | Saddle Maker | Kentucky |
| 48 | Bertha Hugo | 44 | Housekeeper | Housekeeper | Kentucky |
| 49 | James Armstrong | 22 | Head | Bartender | Kentucky |
| 50 | Harriet Armstrong | 20 | Wife | Waitress | Kentucky |
| 51 | Artie Armstrong | 44 | Mother | — | Kentucky |
| 52 | Peter W. Klein | 64 | Head | — | Indiana |
| 53 | Mary Klein THIS PERSON | 58 | Wife | — | Kentucky |
| 54 | Cathryn Klein | 33 | Daughter | Stenographer | Kentucky |
| 55 | Antoinette Klein | 31 | Daughter | Stock Girl | Kentucky |
| 56 | William P. Klein | 29 | Son | Repair Man | Kentucky |
| 57 | Frank P. Klein | 27 | Son | Shipping Clerk | Kentucky |
| 58 | Florence Klein | 25 | Daughter | — | Kentucky |
| 59 | Bernadette Klein | 21 | Daughter | Stenographer | Kentucky |
| 60 | Raymond Klein | 18 | Son | — | Kentucky |
| 61 | John Z. Klein | 13 | Son | — | Kentucky |
| 62 | John Ulrich | 53 | Head | — | Illinois |
| 63 | Frank Fallowell | 50 | Lodger | — | Kentucky |
| 64 | John Franks | 39 | Head | Brass Finisher | Kentucky |
| 65 | Leona Franks | 38 | Wife | — | Kentucky |
| 66 | Albert F. Franks | 18 | Son | New Worker | Kentucky |
| 67 | Gertrude Franks | 16 | Daughter | — | Kentucky |
| 68 | Robert Franks | 14 | Son | — | Kentucky |
| 69 | Matilda Franks | 13 | Daughter | — | Kentucky |
| 70 | Eugene Franks | 8 | Son | — | Kentucky |
| 71 | William Holtmann | 50 | Head | Furniture Finisher | Kentucky |
| 72 | Emma L. Holtmann | 30 | Wife | Ironer | Kentucky |
| 73 | Robert Russel | 9 | Step Child | — | Kentucky |
| 74 | Mildred Russel | 8 | Step Child | — | Kentucky |
| 75 | Lila Best | 28 | Lodger | Laundry | Kentucky |
| 76 | Christ Hoffman | 49 | Head | Jeweler | Kentucky |
| 77 | Nellie Hoffman | 46 | Wife | — | Kentucky |
| 78 | Billy Hoffman | 16 | Son | Messenger 1384 | Kentucky |
| 79 | Joseph Hoffman | 12 | Son | — | Kentucky |
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)