MF
Mary Frederick — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Knox, Ohio
Our Model Tree links this Mary Frederick across the 1920 and 1930 US Censuses in Knox, Ohio (XGBoost, ~Confirmed) — first a spouse (b.~1880), then head of a 18-person household.
Age 50
b. ~1880
Female
Spouse
Born: Ohio
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Knox, Ohio |
| Surname | Frederick |
| Given Name | Mary S |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 20 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Hilliar Township |
| Est. Birth Year | ~1880 |
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.
18 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Frederick | Spouse | — | 50 | ~1880 |
| Nellie Townley | Daughter | — | 7 | ~1923 |
| Ruth Mccoy | Head | — | 73 | ~1857 |
| Pearl Conking | Spouse | — | 47 | ~1883 |
| Floyd White | Other | — | 23 | ~1907 |
| Ross Conking | Other | — | 47 | ~1883 |
| Robert Townley | Son | — | 9 | ~1921 |
| John Townley | Son | — | 15 | ~1915 |
| Edward Townley | Son | — | 4 | ~1926 |
| Don Conking | Son | — | 22 | ~1908 |
| Hattie Townley | Spouse | — | 39 | ~1891 |
| William Lester | Other | — | 19 | ~1911 |
| Edward Townley | Other | — | 46 | ~1884 |
| Byron White | Other | — | 63 | ~1867 |
| Charles Frederick | Other | — | 53 | ~1877 |
| June Townley | Daughter | — | 13 | ~1917 |
| Ada White | Spouse | — | 23 | ~1907 |
| Abbie White | Spouse | — | 62 | ~1868 |
Census Appearances
1920
Knox, Ohio
Spouse, age 39
Knox, Ohio · implied b. ~1881 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | Mary J |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Knox, Ohio
Spouse, age 50
Knox, Ohio · implied b. ~1880 — 18 household members
| Surname | Frederick |
| Given Name | Mary S |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 20 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 (1920 and 1930) in Knox, Ohio, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Frederick
Spouse · 1930 · age 50 · b. ~1880 · Ohio
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Knox, Ohio
Open full size
1930 US Federal Census — Knox, Ohio
Page Contents
50 people indexed on this census page (ia:1930:ohiocensus00reel1825:1035)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Katheryn C Belcher | 20 | Daughter | — | Virginia |
| 2 | Ida M Belcher | 18 | Daughter | — | Virginia |
| 3 | Sarah G Belcher | 17 | Daughter | — | Virginia |
| 4 | Herman A Belcher | 15 | Son | — | Virginia |
| 5 | Reba J Belcher | 13 | Daughter | — | Virginia |
| 6 | Carl R Belcher | 9 | Son | — | Virginia |
| 7 | Kenneth J Belcher | 7 | Son | — | Virginia |
| 8 | Ray A Belcher | 5 | Son | — | Ohio |
| 9 | Hardy E Grandstaff | 30 | Head | Farmer | Ohio |
| 10 | Carolyn Grandstaff | 26 | Wife | — | Ohio |
| 11 | Virginia R Grandstaff | 4 | Daughter | — | Ohio |
| 12 | Evelyn M Grandstaff | 1 | Daughter | — | Ohio |
| 13 | Rennselaer H Long | 58 | Un | Clergyman | Ohio |
| 14 | Gayle H Long | 52 | Wife | — | Michigan |
| 15 | Father Long | 86 | Father | — | Ohio |
| 16 | Harry Hoover | 66 | Brother-in-law | — | Ohio |
| 17 | Jasper J Crallinger | 62 | Un | Farmer | Iowa |
| 18 | Alice E Crallinger | 58 | Wife | — | Ohio |
| 19 | Charles M Crallinger | 74 | Brother | — | Iowa |
| 20 | Oral T Wyatt | 27 | Un | Laborer | Ohio |
| 21 | Marguerite L Wyatt | 22 | Wife | — | Ohio |
| 22 | George E Robbins | 52 | Un | Preacher | Ohio |
| 23 | Ruth M Robbins | 37 | Wife | — | Ohio |
| 24 | Elizabeth J Robbins | 2 | Daughter | — | Ohio |
| 25 | Dennis Hoops | 33 | Servant | Laborer | Ohio |
| 26 | Arthur J Peterson | 35 | Head | Drayman | Ohio |
| 27 | Ada B Peterson | 32 | Wife | — | Ohio |
| 28 | Walter S Peterson | 12 | Son | — | Ohio |
| 29 | Kathleen P Peterson | 11 | Daughter | — | Ohio |
| 30 | Bernice A Peterson | 8 | Daughter | — | Ohio |
| 31 | James A Peterson | 6 | Son | — | Ohio |
| 32 | Henry W Cullison | 17 | Brother-in-law | Laborer | Ohio |
| 33 | Ruth Mccoy | 73 | Head | — | Pennsylvania |
| 34 | Ross Conking | 47 | Un | Foreman | Ohio |
| 35 | Pearl M Conking | 47 | Wife | — | Ohio |
| 36 | Don Conking | 22 | Son | Machinist | Ohio |
| 37 | Byron J White | 63 | Un | Farmer | Ohio |
| 38 | Abbie S White | 62 | Wife | — | Ohio |
| 39 | Floyd W White | 23 | Un | Farmer | Ohio |
| 40 | Ada M White | 23 | Wife | — | Ohio |
| 41 | Charles A Frederick | 53 | Un | Farmer | Ohio |
| 42 | Mary S Frederick THIS PERSON | 50 | Wife | — | Ohio |
| 43 | Edward M Townley | 46 | Un | Laborer | Ohio |
| 44 | Hattie L Townley | 39 | Wife | — | Ohio |
| 45 | John H Townley | 15 | Son | — | Ohio |
| 46 | June E Townley | 13 | Daughter | — | Ohio |
| 47 | Robert D Townley | 9 | Son | — | Ohio |
| 48 | Nellie M Townley | 7 | Daughter | — | Ohio |
| 49 | Edward M Jr Townley | 4 | Son | — | Ohio |
| 50 | William G Lester | 19 | Un | Laborer | Virginia |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)