MC
Mary Cook — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegany-County, Maryland
Our Model Tree links this Mary Cook across the 1920, 1930 and 1940 US Censuses in Allegany-County, Maryland (XGBoost, ~Confirmed), with identified parents Clarence & Elizabeth — first a spouse (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Female
Spouse
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegany-County, Maryland |
| Surname | Cook |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Mt. Savage Md |
| 1935 Residence (County) | Allegany |
| Additional Details | |
| Industry | H |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Mt Savage Md |
| Est. Birth Year | ~1918 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Nancy Cook | Daughter | — | 1 | ~1939 |
| Jess Cook | Head | — | 25 | ~1915 |
| Mary Cook | Spouse | — | 22 | ~1918 |
Census Appearances
1920
Allegany, Maryland
Daughter, age 3
Allegany, Maryland · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooke |
| Given Name | Mary E. |
| 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
Allegany, Maryland
Daughter, age 13
Allegany, Maryland · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| 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 | Wales |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Allegany-County, Maryland
Spouse, age 22
Allegany-County, Maryland · implied b. ~1918 — 3 household members
| Surname | Cook |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Mt. Savage Md |
| 1935 Residence (County) | Allegany |
| Industry | H |
| Highest Grade | No 4 |
| 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 Cook across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Clarence Cook (~0.92 confidence) and mother Elizabeth Cook (~0.92 confidence) and father Harry Cooke (~0.92 confidence) and mother Ruth Cooke (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Clarence Cook
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Cook
b. ~1894
Source mother
● Household
· direct · ~0.92
Father
Harry Cooke
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Ruth Cooke
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Cook
Spouse · 1940 · age 22 · b. ~1918 · Maryland
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Allegany-County, Maryland
Open full size
1940 US Federal Census — Allegany-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01500-00421)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James Walsh | 26 | Head | Truck Driver | Maryland |
| 42 | Vera Walsh | 25 | Wife | — | Maryland |
| 43 | James L Walsh | 8 | Son | — | Maryland |
| 44 | Winifred Walsh | 6 | Daughter | — | Maryland |
| 45 | Robert Walsh | 4 | Son | — | Maryland |
| 46 | Gerald Walsh | 1 | Son | — | Maryland |
| 47 | Jess Cook | 25 | Head | Brick Setter | Maryland |
| 48 | Mary Cook THIS PERSON | 22 | Wife | — | Maryland |
| 49 | Nancy Cook | 1 | Daughter | — | Maryland |
| 50 | Andy Grimm | 61 | Head | — | Maryland |
| 51 | Mary Grimm | 57 | Wife | — | Maryland |
| 52 | Dorothy Grimm | 27 | Daughter | Hair Dresser | Maryland |
| 53 | Agnes Grimm | 24 | Daughter | New Worker | Maryland |
| 54 | Ronald Grimm | 27 | Son | Silk Spinner | Maryland |
| 55 | Francis Grimm | 25 | Daughter in law | Textile Worker | Florida |
| 56 | Grace Blank | 53 | Head | — | Maryland |
| 57 | Gerald Blank | 21 | Son | Bobbin Store | Maryland |
| 58 | Paul Deffenbaugh | 31 | Son in law | Laborer | Maryland |
| 59 | Gladys Deffenbaugh | 27 | Daughter | — | Maryland |
| 60 | Charles Stephens | 27 | Head | Oiler | Maryland |
| 61 | Dorothy Stephens | 24 | Wife | — | Maryland |
| 62 | Darlene Stephens | 2 | Daughter | — | Maryland |
| 63 | Harold Hille | 18 | Head | — | Maryland |
| 64 | Gladys Hille | 21 | Sister | — | Maryland |
| 65 | Joseph Lily | 30 | Brother in law | Machinist | Maryland |
| 66 | Anna M Lily | 28 | Sister | — | Maryland |
| 67 | Anna Lily | 8 | Niece | — | Maryland |
| 68 | Thomas Adams | 51 | Head | Laborer | Maryland |
| 69 | Isabelle Adams | 47 | Wife | — | Maryland |
| 70 | Gladys Adams | 20 | Daughter | Textile Worker | Maryland |
| 71 | Isabelle M Adams | 16 | Daughter | — | Maryland |
| 72 | Louise Adams | 13 | Daughter | — | Maryland |
| 73 | Thomas G Adams | 12 | Son | — | Maryland |
| 74 | Patricia Adams | 10 | Daughter | — | Maryland |
| 75 | John Smith | 36 | Head | Laborer | Maryland |
| 76 | Mary Smith | 48 | Wife | — | Maryland |
| 77 | John Sombine | 79 | Father in law | — | Pennsylvania |
| 78 | Lloyd Tiade | 44 | Head | Watchman | Maryland |
| 79 | Margaret Tiade | 24 | Wife | — | Maryland |
| 80 | Lloyd Jr Tiade | 2 | Son | — | Maryland |
Pedigree Summary
Mary
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)