MS
Mary Shaffer — 1940 US Census Record
Model Tree available1940 United States Federal Census · Frederick-County, Maryland
Our Model Tree links this Mary Shaffer across the 1920, 1930 and 1940 US Censuses in Frederick-County, Maryland (XGBoost, ~Confirmed), with identified parents George & Wesley — first a daughter (b.~1916), then head of a 11-person household.
Age 24
b. ~1916
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Frederick-County, Maryland |
| Surname | Shaffer |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District #8 Liberty |
| 1935 Residence (County) | Frederick |
| Additional Details | |
| Highest Grade | H-3 |
| 1935 Residence | Same Place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Election District 8 Liberty |
| Est. Birth Year | ~1916 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Effie Shaffer | Spouse | — | 48 | ~1892 |
| Dorothy Shaffer | Other | — | 7 | ~1933 |
| George Shaffer | Son | — | 20 | ~1920 |
| John Shaffer | Other | — | 12 | ~1928 |
| Nettie Shaffer | Other | — | 17 | ~1923 |
| Rebecca Shaffer | Other | — | 8 | ~1932 |
| Ruth Shaffer | Other | — | 6 | ~1934 |
| Pauline Shaffer | Other | — | 1 | ~1939 |
| George Shaffer | Head | — | 48 | ~1892 |
| Mary Shaffer | Daughter | — | 24 | ~1916 |
| Betty Shaffer | Other | — | 3 | ~1937 |
Census Appearances
1920
Frederick, Maryland
Daughter, age 3
Frederick, Maryland · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shafer |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Frederick, Maryland
Daughter, age 13
Frederick, Maryland · implied b. ~1917 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shaffer |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Frederick-County, Maryland
Daughter, age 24
Frederick-County, Maryland · implied b. ~1916 — 11 household members
| Surname | Shaffer |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District #8 Liberty |
| 1935 Residence (County) | Frederick |
| Highest Grade | H-3 |
| 1935 Residence | Same Place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Shaffer across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Shaffer (~0.92 confidence) and father Wesley Shaffer (~0.92 confidence) and mother Blanche Shafer (~0.92 confidence) and mother Effie Shaffer (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Shaffer
b. ~1892
Source father
● Household
· direct · ~0.92
Father
Wesley Shaffer
b. ~1894
Source father
● Household
· direct · ~0.92
Mother
Blanche Shafer
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Effie Shaffer
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Shaffer
Daughter · 1940 · age 24 · b. ~1916 · Maryland
★ You are viewing this record
Sibling
George Shaffer
Sibling · 1940 · age 20
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
1940 US Federal Census — Frederick-County, Maryland
Open full size
1940 US Federal Census — Frederick-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01549-00023)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Richard Culler | 14 | Lodger | — | Maryland |
| 2 | Robert D. Suman | 58 | Head | Farmer | Maryland |
| 3 | Mary A. Suman | 57 | Wife | — | Maryland |
| 4 | Edward P. Harris | 13 | Lodger | — | Maryland |
| 5 | Samuel G. Dressler | 53 | Head | Farmer | Maryland |
| 6 | Rosa D. Dressler | 52 | Wife | — | Maryland |
| 7 | York A. Dressler | 21 | Son | Laborer | Maryland |
| 8 | Paul H. Dressler | 16 | Son | — | Maryland |
| 9 | Samuel G. Jr. Dressler | 14 | Son | — | Maryland |
| 10 | James M. Dressler | 11 | Son | — | Maryland |
| 11 | Mary L. Dressler | 3 | Daughter | — | Maryland |
| 12 | George H. Shaffer | 48 | Head | Laborer | Maryland |
| 13 | Effie B. Shaffer | 48 | Wife | — | Maryland |
| 14 | George T. Shaffer | 20 | Son | Laborer | Maryland |
| 15 | Mary E. Shaffer THIS PERSON | 24 | Daughter | — | Maryland |
| 16 | Rebecca L. Shaffer | 8 | Grand Daughter | — | Maryland |
| 17 | Ruth L. Shaffer | 6 | Grand Daughter | — | Maryland |
| 18 | Betty J. Shaffer | 3 | Grand Daughter | — | Maryland |
| 19 | Pauline C. Shaffer | 1 | Grand Daughter | — | Maryland |
| 20 | Nettie E. Shaffer | 17 | Grand Daughter | — | Maryland |
| 21 | John H. Shaffer | 12 | Grand Son | — | Maryland |
| 22 | Dorothy M. Shaffer | 7 | Grand Daughter | — | Maryland |
| 23 | Hardy Doty | 52 | Head | — | Maryland |
| 24 | Virgie D. Doty | 34 | Daughter | — | Maryland |
| 25 | Henry H. Staley | 44 | Head | Farmer | Maryland |
| 26 | Elsie L. Staley | 53 | Wife | — | Maryland |
| 27 | John M. Staley | 16 | Son | — | Maryland |
| 28 | Harry T. Staley | 14 | Son | — | Maryland |
| 29 | Jerome B. Snyder | 45 | Head | Farmer | Maryland |
| 30 | Gladys E. Snyder | 42 | Wife | — | Maryland |
| 31 | Sara M. Snyder | 25 | Daughter | — | Maryland |
| 32 | J. Jerome Snyder | 18 | Son | — | Maryland |
| 33 | J. William C. Snyder | 17 | Son | — | Maryland |
| 34 | Edgar S. Snyder | 15 | Son | — | Maryland |
| 35 | Robert E. Snyder | 11 | Son | — | Maryland |
| 36 | Betty J. Snyder | 3 | Daughter | — | Maryland |
| 37 | Alex B. Rippeon | 67 | Head | Farmer | Maryland |
| 38 | Clara M. Rippeon | 63 | Wife | — | Maryland |
| 39 | Amos C. Rippeon | 30 | Son | Laborer | Maryland |
| 40 | Hattie V. Rippeon | 29 | Daughter | — | Maryland |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)