MW
Mary Whalen — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cochise-County, Arizona
Our Model Tree links this Mary Whalen across the 1920, 1930 and 1940 US Censuses in Cochise-County, Arizona (XGBoost, ~Confirmed), with identified parents Harriet & Ed — first a daughter (b.~1917), then head of a 4-person household.
Age 23
b. ~1917
Female
Daughter
Born: Arizona
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cochise-County, Arizona |
| Surname | Whalen |
| Given Name | Mary Ann |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Arizona |
| 1935 Residence (City) | Willcox Town |
| 1935 Residence (County) | Cochise |
| Additional Details | |
| Occupation | Operator |
| Industry | Telephone |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 742 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
| Occupation | Operator |
| Township / Ward | Willcox Town |
| Est. Birth Year | ~1917 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Whalen | Daughter | — | 23 | ~1917 |
| Edna Whalen | Daughter | — | 27 | ~1913 |
| Hattie Whalen | Head | — | 63 | ~1877 |
| Frank Whalen | Son | — | 29 | ~1911 |
Census Appearances
1920
Cochise, Arizona
Daughter, age 3
Cochise, Arizona · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Whelan |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Arizona |
| Father's Birthplace | Arizona |
| Mother's Birthplace | Nevada |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
1930
Cochise, Arizona
Daughter, age 13
Cochise, Arizona · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Whelan |
| Given Name | Maryann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Arizona |
| Father's Birthplace | Arizona |
| Mother's Birthplace | Nevada |
| Can Read/Write | Yes |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
1940
Cochise-County, Arizona
Daughter, age 23
Cochise-County, Arizona · implied b. ~1917 — 4 household members
| Surname | Whalen |
| Given Name | Mary Ann |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Arizona |
| 1935 Residence (City) | Willcox Town |
| 1935 Residence (County) | Cochise |
| Occupation | Operator |
| Industry | Telephone |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 742 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
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 Whalen across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Harriet Whelan (~0.92 confidence) and father Ed Whelan (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Harriet Whelan
b. ~1879
Source mother
● Household
· direct · ~0.92
Father
Ed Whelan
b. ~1880
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Whalen
Daughter · 1940 · age 23 · b. ~1917 · Arizona
★ You are viewing this record
Sibling
Edna Whalen
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Whalen
Sibling · 1940 · age 29
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 — Cochise-County, Arizona
Open full size
1940 US Federal Census — Cochise-County, Arizona
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00100-00957)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Louise Schwertner | 74 | Head | — | Germany |
| 2 | Albert Joseph Schwertner | 39 | Son | Carpenter | Arizona |
| 3 | Mary Schwertner | 67 | Head | — | Texas |
| 4 | Hattie Whalen | 63 | Head | — | Nevada |
| 5 | Frank (Ab) Whalen | 29 | Son | Tractor Operator | Arizona |
| 6 | Edna Whalen | 27 | daughter | Nurse | Arizona |
| 7 | Mary Ann Whalen THIS PERSON | 23 | daughter | Operator | Arizona |
| 8 | Maude Morris | 56 | Head | — | Texas |
| 9 | Melba Estes | 28 | Niece | Office Clerk | Texas |
| 10 | Richard E. Power | 24 | Head | Catholic Priest | Texas |
| 11 | Frank L. Lewis | 49 | Head | Owner | Mass. |
| 12 | Alfred Elias | 29 | Head | Carpenter Helper | Arizona |
| 13 | Cecilia Elias | 20 | Wife | — | Arizona |
| 14 | Fredrick David Elias | 3 | Son | — | Arizona |
| 15 | Sylvia Isabell Elias | 1 | daughter | — | Arizona |
| 16 | Cruz Ramirez | 52 | Head | Laborer | Texas |
| 17 | Juana Ramirez | 44 | Wife | — | New Mexico |
| 18 | Harold Ramirez | 25 | Son | Laborer | Arizona |
| 19 | Martin Ramirez | 22 | Son | Laborer | Arizona |
| 20 | Marcelino Ramirez | 21 | Son | — | Arizona |
| 21 | Cruz Jr. Ramirez | 19 | Son | — | Arizona |
| 22 | Lydia Ramirez | 17 | daughter | — | Arizona |
| 23 | Rudolph Ramirez | 13 | Son | — | Arizona |
| 24 | Margaret Ramirez | 11 | daughter | — | Arizona |
| 25 | Carlos Ramirez | 9 | Son | — | Arizona |
| 26 | Mary Louise Ramirez | 7 | daughter | — | Arizona |
| 27 | Robert Ramirez | 5 | Son | — | Arizona |
| 28 | Ignacio Flores | 29 | Head | Labor | Arizona |
| 29 | Ramona Flores | 32 | Wife | — | Arizona |
| 30 | Mary Miranda | 17 | daughter | House Cleaning | Arizona |
| 31 | Fernando Miranda | 15 | Son | — | Arizona |
| 32 | Frances Miranda | 10 | daughter | — | Arizona |
| 33 | Sally Bracken | 46 | Head | Housekeeper | Louisiana |
| 34 | Kelly Mae Bracken | 5 | daughter | — | Texas |
| 35 | Geraldine Bracken | 19 | daughter | Housekeeper | Texas |
| 36 | Craig Bracken | 1 | Grand Son | — | Texas |
| 37 | Claude Gardner | 45 | Head | City Marshall | Texas |
| 38 | Ruth Gardner | 35 | Wife | — | California |
| 39 | Claudine Ellen Gardner | 13 | daughter | — | Arizona |
| 40 | Eldon Mitt Gardner | 4 | Son | — | Arizona |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 2 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)