MW
Mary Wolfe — 1940 US Census Record
Model Tree available1940 United States Federal Census · Frederick-County, Maryland
Our Model Tree links this Mary Wolfe across the 1920, 1930 and 1940 US Censuses in Frederick-County, Maryland (XGBoost, ~Confirmed), with identified parents Henry & Caroline — first a daughter (b.~1913), then head of a 6-person household.
Age 27
b. ~1913
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Frederick-County, Maryland |
| Surname | Wolfe |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Urbana Dist. Election District 7 |
| 1935 Residence (County) | Frederick |
| Additional Details | |
| Occupation | Maid |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 240 |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Maid |
| Township / Ward | Urbana Dist Election District 7 |
| Est. Birth Year | ~1913 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Wolfe | Daughter | — | 27 | ~1913 |
| Harry Wolfe | Head | — | 38 | ~1902 |
| Leroy Wolfe | Son | — | 27 | ~1913 |
| Joseph Wolfe | Son | — | 25 | ~1915 |
| Martha Wolfe | Daughter | — | 22 | ~1918 |
| Caroline Wolfe | Spouse | — | 30 | ~1910 |
Census Appearances
Daughter, age 7
Frederick, Maryland · implied b. ~1913 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wolf |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Frederick, Maryland
Daughter, age 18
Frederick, Maryland · implied b. ~1912 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wolfe |
| Given Name | Mary A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Frederick-County, Maryland
Daughter, age 27
Frederick-County, Maryland · implied b. ~1913 — 6 household members
| Surname | Wolfe |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Urbana Dist. Election District 7 |
| 1935 Residence (County) | Frederick |
| Occupation | Maid |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 240 |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| 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 Wolfe across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Henry Wolf (~0.92 confidence) and mother Caroline Wolf (~0.92 confidence) and father Harry Wolfe (~0.92 confidence) and father Harry Wolfe (~0.60 confidence) and mother Caroline Wolfe (~0.60 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.79
Father
Henry Wolf
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Caroline Wolf
b. ~1882
Source mother
● Household
· direct · ~0.92
Father
Harry Wolfe
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Harry Wolfe
b. ~1902
Source father
● Household
· direct · ~0.6
Mother
Caroline Wolfe
b. ~1910
Source mother
● Household
· direct · ~0.6
This person
Anchor record
Mary Wolfe
Daughter · 1940 · age 27 · b. ~1913 · Maryland
★ You are viewing this record
Sibling
Joseph Wolfe
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leroy Wolfe
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martha Wolfe
Sibling · 1940 · age 22
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-t0627-01548-00807)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Martha S Baugher | 4 | Daughter | — | — |
| 2 | Ray M Jr Baugher | 1 | Son | — | — |
| 3 | Ruby Anne Baugher | 0 | Daughter | — | — |
| 4 | Harry L Morningstar | 49 | Head | Farmer | Maryland |
| 5 | Gladys N Morningstar | 43 | Wife | Housewife | Maryland |
| 6 | James H. S. Murphy | 43 | Head | Huckster | Maryland |
| 7 | Mildred Murphy | 21 | Daughter | Waitress | Maryland |
| 8 | Ardell Murphy | 19 | Daughter | Waitress | Maryland |
| 9 | Kenneth J. Murphy | 14 | Son | — | Maryland |
| 10 | Janis J. Murphy | 12 | Daughter | — | Maryland |
| 11 | Wendell Murphy | 8 | Son | — | Maryland |
| 12 | Regina Murphy | 7 | Daughter | — | Maryland |
| 13 | Effie E. Pope | 42 | Housekeeper | Housekeeper | Maryland |
| 14 | William Ambush | 49 | Head | Farmer | Maryland |
| 15 | Genevieve M. Ambush | 46 | Wife | Housewife | Maryland |
| 16 | P. Garnett Jones | 15 | Lodger | — | Dist Col |
| 17 | James Brown | 13 | Lodger | — | Dist Col |
| 18 | Joseph V. Jones | 12 | Lodger | — | Dist Col |
| 19 | Alban N. Richards | 18 | Lodger | Cook | Mass. |
| 20 | Florence V. Ambush | 48 | Head | Housework | Maryland |
| 21 | Constance V. Clagett | 6 | Niece | — | Maryland |
| 22 | Leroy White | 16 | Lodger | — | Maryland |
| 23 | Philip J. Ambush | 47 | Head | Farmer | Maryland |
| 24 | Lillian M. Ambush | 46 | Wife | Housewife | Maryland |
| 25 | Lawrence P. Ambush | 23 | Son | Laborer | Maryland |
| 26 | Ernest H. Ambush | 21 | Son | Laborer | Maryland |
| 27 | Morris F. Ambush | 17 | Son | — | Maryland |
| 28 | Helen V. Ambush | 15 | Daughter | — | Maryland |
| 29 | Vernon Ambush | 10 | Son | — | Maryland |
| 30 | Leo L. Ambush | 7 | Son | — | Maryland |
| 31 | Leonard L. Ambush | 7 | Son | — | Maryland |
| 32 | Linwood Ambush | 5 | Son | — | Maryland |
| 33 | Georgia V. Ambush | 3 | Daughter | — | Maryland |
| 34 | Leon Ambush | 0 | Son | — | Maryland |
| 35 | Harry C. O. Wolfe | 38 | Head | Contractor | Penn. |
| 36 | Caroline R. Wolfe | 30 | Wife | Housewife | Maryland |
| 37 | Mary A. Wolfe THIS PERSON | 27 | Daughter | Maid | Maryland |
| 38 | Leroy J. Wolfe | 27 | Son | Bus Driver | Maryland |
| 39 | Joseph L. Wolfe | 25 | Son | Laborer | Maryland |
| 40 | Martha R. Wolfe | 22 | Daughter | Maid | Maryland |
Related Census Records
Pedigree Summary
Mary + 3 siblings
Gen 1 · 5 parents
~0.79
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)