MF
Mary Frederick — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Montgomery, Pennsylvania
Our Model Tree links this Mary Frederick across the 1910 and 1920 US Censuses in Montgomery, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1902), then head of a 8-person household.
Age 18
b. ~1902
Female
Daughter
Born: Pennsylvania
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Montgomery, Pennsylvania |
| Surname | Frederick |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Lower Salford Twp West |
| Est. Birth Year | ~1902 |
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 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Allen Frederick | Head | — | 42 | ~1878 |
| Laura Frederick | Daughter | — | 6 | ~1914 |
| James Frederick | Son | — | 10 | ~1910 |
| Franklin Frederick | Son | — | 4 | ~1916 |
| Wilmer Frederick | Son | — | 20 | ~1900 |
| Lizzie Frederick | Spouse | — | 40 | ~1880 |
| Catherine Frederick | Daughter | — | 12 | ~1908 |
| Mary Frederick | Daughter | — | 18 | ~1902 |
Census Appearances
1910
Montgomery, Pennsylvania
Daughter, age 8
Montgomery, Pennsylvania · implied b. ~1902 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Montgomery, Pennsylvania
Daughter, age 18
Montgomery, Pennsylvania · implied b. ~1902 — 8 household members
| Surname | Frederick |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 (1910 and 1920) in Montgomery, Pennsylvania, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Frederick
Daughter · 1920 · age 18 · b. ~1902 · Pennsylvania
★ You are viewing this record
Sibling
Franklin Frederick
Sibling · 1920 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wilmer Frederick
Sibling · 1920 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Frederick
Sibling · 1920 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Laura Frederick
Sibling · 1920 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Frederick
Sibling · 1920 · age 10
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
1920 US Federal Census — Montgomery, Pennsylvania
Open full size
1920 US Federal Census — Montgomery, Pennsylvania
Page Contents
49 people indexed on this census page (ia:1920:14thcensusofpopu1605unit:0909)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Amos F. Ledusch | 49 | Head | Farmer | Pennsylvania |
| 2 | Kate D. Ledusch | 46 | Wife | — | Pennsylvania |
| 3 | Elizabeth H. Ledusch | 21 | Daughter | — | Pennsylvania |
| 4 | Katharyn N. Ledusch | 19 | Daughter | Cigar Maker | Pennsylvania |
| 5 | Sara H. Ledusch | 14 | Daughter | Book Keeper | Pennsylvania |
| 6 | Paul Edward Ledusch | 12 | Son | — | Pennsylvania |
| 7 | Eva Rachel Ledusch | 8 | Daughter | — | Pennsylvania |
| 8 | Irvin C. Kuhn | 31 | Head | Dealer | Pennsylvania |
| 9 | Edith W. Kuhn | 30 | Wife | — | Pennsylvania |
| 10 | Amos Virginia Kuhn | 5 | Daughter | — | Pennsylvania |
| 11 | Anna Mae Kuhn | 2 | Daughter | — | Pennsylvania |
| 12 | Edith Miriam Kuhn | 0 | Daughter | — | Pennsylvania |
| 13 | Jacob F. Benner | 64 | Head | Farmer | Pennsylvania |
| 14 | Eliza J. Benner | 64 | Wife | — | Pennsylvania |
| 15 | David M. Benner | 39 | Head | Farmer | Pennsylvania |
| 16 | Lydia U. Benner | 40 | Wife | — | Pennsylvania |
| 17 | Raymond G. Benner | 15 | Son | — | Pennsylvania |
| 18 | Charles G. Benner | 13 | Son | — | Pennsylvania |
| 19 | Milton G. Benner | 8 | Son | — | Pennsylvania |
| 20 | Elizabeth Geiger | 80 | Mother-in-Law | — | Pennsylvania |
| 21 | Linnaeus B. Ziegler | 46 | Head | Farmer | Pennsylvania |
| 22 | Stella B. Ziegler | 41 | Wife | — | Pennsylvania |
| 23 | Ralph B. Ziegler | 22 | Son | Laborer | Pennsylvania |
| 24 | Ira B. Ziegler | 14 | Son | — | Pennsylvania |
| 25 | Edna B. Ziegler | 10 | Daughter | — | Pennsylvania |
| 26 | Albert B. Ziegler | 7 | Son | — | Pennsylvania |
| 27 | Myrtle B. Ziegler | 4 | Daughter | — | Pennsylvania |
| 28 | Beulah B. Ziegler | 1 | Daughter | — | Pennsylvania |
| 29 | Quay S. Greaser | 23 | Head | Farmer | Pennsylvania |
| 30 | Sallie S. Greaser | 20 | Wife | — | Pennsylvania |
| 31 | Stanley Greaser | 1 | Son | — | Pennsylvania |
| 32 | Edith Greaser | 0 | Daughter | — | Pennsylvania |
| 33 | Russell B. Souder | 25 | Head | Farmer | Pennsylvania |
| 34 | Katie G. Souder | 25 | Wife | — | Pennsylvania |
| 35 | Mildred G. Souder | 4 | Daughter | — | Pennsylvania |
| 36 | Marian G. Souder | 3 | Daughter | — | Pennsylvania |
| 37 | Anna Catharine Souder | 0 | Daughter | — | Pennsylvania |
| 38 | Allen N. Frederick | 42 | Head | Farmer | Pennsylvania |
| 39 | Lizzie K. Frederick | 40 | Wife | — | Pennsylvania |
| 40 | Wilmer M. Frederick | 20 | Son | Laborer | Pennsylvania |
| 41 | Mary M. Frederick THIS PERSON | 18 | Daughter | — | Pennsylvania |
| 42 | Catherine M. Frederick | 12 | Daughter | — | Pennsylvania |
| 43 | James M. Frederick | 10 | Son | — | Pennsylvania |
| 44 | Laura M. Frederick | 6 | Daughter | — | Pennsylvania |
| 45 | Franklin M. Frederick | 4 | Son | — | Pennsylvania |
| 46 | Joseph Pellkofer | 62 | Head | Farmer | Germany |
| 47 | Susanna Pellkofer | 54 | Wife | — | Germany |
| 48 | Isaac G. Kerns | 29 | Head | Laborer | Pennsylvania |
| 49 | Alvada Kerns | 25 | Wife | — | Pennsylvania |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)