MF
Mary Frederick — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Morgan-County, West Virginia
Our Model Tree links this Mary Frederick across the 1930 and 1940 US Censuses in Morgan-County, West Virginia (XGBoost, ~Confirmed) — first a spouse (b.~1900), then head of a 8-person household.
Age 40
b. ~1900
Female
Spouse
Born: West Virginia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Morgan-County, West Virginia |
| Surname | Frederick |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | West Virginia |
| 1935 Residence (City) | Bath District |
| 1935 Residence (County) | Morgan |
| Additional Details | |
| Occupation | seamstress |
| Industry | W. P. A. |
| Class of Worker | GW |
| Income (1939) | 45 |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | West Virginia |
| Birth Country | United States |
| Birthplace (normalized) | west virginia |
| Occupation | Seamstress |
| Township / Ward | Bath District |
| Est. Birth Year | ~1900 |
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 |
|---|---|---|---|---|
| Charles Frederick | Head | — | 45 | ~1895 |
| Lenwood Frederick | Son | — | 18 | ~1922 |
| Mary Frederick | Spouse | — | 40 | ~1900 |
| Betty Frederick | Daughter | — | 15 | ~1925 |
| Junior Frederick | Son | — | 12 | ~1928 |
| Mary Frederick | Daughter | — | 10 | ~1930 |
| Charles Frederick | Son | — | 5 | ~1935 |
| Julia Frederick | Daughter | — | 7 | ~1933 |
Census Appearances
1930
Morgan, West …
Other, age 30
Morgan, West Virginia · implied b. ~1900 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | Mary E. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | West Virginia |
| Age at First Marriage | 22 |
| Father's Birthplace | West Virginia |
| Mother's Birthplace | West Virginia |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | West Virginia |
| Birth Country | United States |
| Birthplace (normalized) | west virginia |
1940
Morgan-County, West …
Spouse, age 40
Morgan-County, West Virginia · implied b. ~1900 — 8 household members
| Surname | Frederick |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | West Virginia |
| 1935 Residence (City) | Bath District |
| 1935 Residence (County) | Morgan |
| Occupation | seamstress |
| Industry | W. P. A. |
| Class of Worker | GW |
| Income (1939) | 45 |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | West Virginia |
| Birth Country | United States |
| Birthplace (normalized) | west virginia |
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.
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This person
Anchor record
Mary Frederick
Spouse · 1940 · age 40 · b. ~1900 · West Virginia
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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 — Morgan-County, West Virginia
Open full size
1940 US Federal Census — Morgan-County, West Virginia
Page Contents
32 people indexed on this census page (nara:1940:m-t0627-04434-00498)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary C. Spears | 25 | Wife | — | Pennsylvania |
| 42 | Gene William Spears | 3 | Son | — | Pennsylvania |
| 43 | Mathias Swaim | 28 | Head | Proprietor | West Virginia |
| 44 | Aldine Swaim | 25 | Wife | — | Pennsylvania |
| 45 | Ray L. Swain | 33 | Head | — | West Virginia |
| 46 | Elba F. Swain | 28 | Wife | — | West Virginia |
| 47 | Patsy Ann Swain | 1 | daughter | — | West Virginia |
| 48 | Gilbert De Haven | 36 | Head | Well Driller | West Virginia |
| 49 | May D. De Haven | 36 | Wife | Maid | West Virginia |
| 50 | Junior De Haven | 14 | Son | — | West Virginia |
| 51 | Charles E. Frederick | 45 | Head | — | West Virginia |
| 52 | Mary E. Frederick THIS PERSON | 40 | Wife | Seamstress | West Virginia |
| 53 | Lenwood Frederick | 18 | Son | Laborer | West Virginia |
| 54 | Betty Lee Frederick | 15 | daughter | — | West Virginia |
| 55 | Junior Lee Frederick | 12 | Son | — | West Virginia |
| 56 | Mary Louise Frederick | 10 | daughter | — | West Virginia |
| 57 | Julia Mae Frederick | 7 | daughter | — | West Virginia |
| 58 | Charles Lloyd Frederick | 5 | Son | — | West Virginia |
| 59 | Thomas D. Geronimo | 48 | Head | Porter | Italy |
| 60 | Margaret Geronimo | 28 | Wife | — | West Virginia |
| 61 | Vernon Geronimo | 17 | Son | Labor | West Virginia |
| 62 | Mary Geronimo | 15 | daughter | — | West Virginia |
| 63 | Raymond Waugh | 29 | Head | Mechanic | West Virginia |
| 64 | Alora Waugh | 25 | Wife | Looper | West Virginia |
| 65 | Ruthelaine Waugh | 8 | daughter | — | West Virginia |
| 66 | Lewis Richard Waugh | 6 | Son | — | West Virginia |
| 67 | Robert Larry Waugh | 1 | Son | — | West Virginia |
| 68 | Heber Holiday | 27 | Head | Carpenter | West Virginia |
| 69 | Ella Holiday | 24 | Wife | Housework | West Virginia |
| 70 | John W. Fulton | 27 | Head | Grade Teacher | West Virginia |
| 71 | Mildred Fulton | 27 | Wife | — | West Virginia |
| 72 | Janet Fulton | 3 | daughter | — | West Virginia |
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)