MF
Mary Frederick — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mason-County, Kentucky
Our Model Tree links this Mary Frederick across the 1930 and 1940 US Censuses in Mason-County, Kentucky (XGBoost, ~Confirmed) — first a spouse (b.~1886), then head of a 8-person household.
Age 54
b. ~1886
Female
Spouse
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mason-County, Kentucky |
| Surname | Frederick |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Mason |
| Additional Details | |
| Highest Grade | No 0 |
| 1935 Residence | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Magisterial Dist 7 |
| Est. Birth Year | ~1886 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Alphonzo Frederick | Head | — | 58 | ~1882 |
| Ronald Kidwell | Other | — | 5 | ~1935 |
| Alene Kidwell | Daughter | — | 26 | ~1914 |
| William Frederick | Son | — | 15 | ~1925 |
| Dora Frederick | Son | — | 17 | ~1923 |
| Jessie Frederick | Son | — | 20 | ~1920 |
| Mary Kidwell | Other | — | 10 | ~1930 |
| Mary Frederick | Spouse | — | 54 | ~1886 |
Census Appearances
1930
Mason, Kentucky
Spouse, age 44
Mason, Kentucky · implied b. ~1886 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Kentucky |
| Age at First Marriage | 13 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Mason-County, Kentucky
Spouse, age 54
Mason-County, Kentucky · implied b. ~1886 — 8 household members
| Surname | Frederick |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Mason |
| Highest Grade | No 0 |
| 1935 Residence | Kentucky |
| 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 Frederick across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Frederick
Spouse · 1940 · age 54 · b. ~1886 · 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 — Mason-County, Kentucky
Open full size
1940 US Federal Census — Mason-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01340-00422)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clarence J. J. Codd | 6 | Son | — | Kentucky |
| 42 | Richard Schaleman | 36 | Head | Farmer | Kentucky |
| 43 | Lucille Schaleman | 26 | Wife | — | Kentucky |
| 44 | Sally Schaleman | 67 | Head | — | Kentucky |
| 45 | Glenn Mills | 33 | Son-in-law | Painter & Paper Hanger | Kentucky |
| 46 | Alberta Mills | 29 | Daughter | Waitress | Kentucky |
| 47 | Edgar Moreland | 61 | Head | Day Laborer | Kentucky |
| 48 | Effie Moreland | 54 | Wife | — | Kentucky |
| 49 | Leona Moreland | 19 | Daughter | — | Kentucky |
| 50 | Betty Lou Grimes | 10 | G-daughter | — | Kentucky |
| 51 | Alphonzo Frederick | 58 | Head | Farm Laborer | Kentucky |
| 52 | Mary Frederick THIS PERSON | 54 | Wife | — | Kentucky |
| 53 | Jessie Frederick | 20 | Son | Day Laborer | Kentucky |
| 54 | Dora Frederick | 17 | Son | — | Kentucky |
| 55 | William Frederick | 15 | Son | — | Kentucky |
| 56 | Alene Kidwell | 26 | Daughter | — | Kentucky |
| 57 | Mary Tosh Kidwell | 10 | G-daughter | — | Kentucky |
| 58 | Ronald Kidwell | 5 | G-son | — | Kentucky |
| 59 | Oscar Quall | 38 | Head | Coal Passer | Kentucky |
| 60 | Myrtle Quall | 35 | Wife | — | Kentucky |
| 61 | Robert Quall | 18 | Son | Laborer | Kentucky |
| 62 | Louis Quall | 10 | Son | — | Kentucky |
| 63 | James Quall | 8 | Son | — | Kentucky |
| 64 | Roy Quall | 5 | Son | — | Kentucky |
| 65 | Katherine Quall | 1 | Daughter | — | Kentucky |
| 66 | William Quall | 3 | Son | — | Kentucky |
| 67 | Thomas L. Trotter | 59 | Head | Farm Passer | Kentucky |
| 68 | Leona Trotter | 55 | Wife | — | Kentucky |
| 69 | Walter Gibson | 40 | Son-in-law | Brakeman | Kentucky |
| 70 | N. Dot R. Gibson | 35 | Daughter | Typist | Kentucky |
| 71 | Barbara Gibson | 11 | G-daughter | — | Kentucky |
| 72 | Daisy Cobb | 76 | Mother-in-law | — | Kentucky |
| 73 | Howard Tesser | 71 | Head | Farmer | Virginia |
| 74 | Marietta Tesser | 70 | Wife | — | Kentucky |
| 75 | Robert S. Henderson | 35 | Head | Farm Laborer | Kentucky |
| 76 | Thelma Henderson | 30 | Wife | — | Kentucky |
| 77 | Lillie Henderson | 13 | Daughter | — | Kentucky |
| 78 | Ruby Henderson | 11 | Daughter | — | Kentucky |
| 79 | Robert Jr. Henderson | 9 | Son | — | Kentucky |
| 80 | Betty J. Henderson | 6 | Daughter | — | 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)