MN
Mary Nicholson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Blair-County, Pennsylvania
Our Model Tree links this Mary Nicholson across the 1920, 1930 and 1940 US Censuses in Blair-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Edward & Anna — first a daughter (b.~1919), then head of a 6-person household.
Age 21
b. ~1919
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Blair-County, Pennsylvania |
| Surname | Nicholson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Altoona City |
| 1935 Residence (County) | Blair |
| Additional Details | |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Altoona City |
| Est. Birth Year | ~1919 |
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 Nicholson | Daughter | — | 21 | ~1919 |
| Hilda Nicholson | Daughter | — | 25 | ~1915 |
| Anna Nicholson | Daughter | — | 23 | ~1917 |
| John Nicholson | Son | — | 17 | ~1923 |
| Edward Nicholson | Head | — | 59 | ~1881 |
| Anna Nicholson | Spouse | — | 54 | ~1886 |
Census Appearances
1920
Blair, Pennsylvania
Daughter, age 1
Blair, Pennsylvania · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nicholson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Blair, Pennsylvania
Daughter, age 11
Blair, Pennsylvania · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nicholson |
| Given Name | Mary H. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Blair-County, Pennsylvania
Daughter, age 21
Blair-County, Pennsylvania · implied b. ~1919 — 6 household members
| Surname | Nicholson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Altoona City |
| 1935 Residence (County) | Blair |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| 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 Nicholson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Edward Nicholson (~0.92 confidence) and mother Anna Nicholson (~0.92 confidence) and mother Anna Nicholson (~0.92 confidence) and mother Cora Nicholson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Edward Nicholson
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Anna Nicholson
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Anna Nicholson
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Cora Nicholson
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Nicholson
Daughter · 1940 · age 21 · b. ~1919 · Pennsylvania
★ You are viewing this record
Sibling
John Nicholson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Nicholson
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hilda Nicholson
Sibling · 1940 · age 25
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 — Blair-County, Pennsylvania
Open full size
1940 US Federal Census — Blair-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03439-00396)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Gary Grant Carl | 4 | Grandson | — | Pennsylvania |
| 2 | George Eusmebecker | 46 | Head | Salesman | Pennsylvania |
| 3 | Elizabeth Eusmebecker | 44 | Wife | — | Pennsylvania |
| 4 | Mary Eusmebecker | 5 | Daughter | — | Pennsylvania |
| 5 | John L. Faver | 52 | Head | Electrician Supervisor | Pennsylvania |
| 6 | Mary S. Faver | 50 | Wife | — | Pennsylvania |
| 7 | Howard Faver | 21 | Son | Electrician Repairman | Pennsylvania |
| 8 | Ralph Faver | 17 | Son | — | Pennsylvania |
| 9 | Shirley Faver | 16 | Daughter | — | Pennsylvania |
| 10 | — | None | — | Painter & Paper Hanger | — |
| 11 | Thomas J. Tuefel | 36 | Head | — | Pennsylvania |
| 12 | Stella Tuefel | 37 | Wife | — | Pennsylvania |
| 13 | Dorothy Tuefel | 17 | Daughter | — | Pennsylvania |
| 14 | Eugene Tuefel | 16 | Son | — | Pennsylvania |
| 15 | Thomas Tuefel | 12 | Son | — | Pennsylvania |
| 16 | Joseph Tuefel | 10 | Son | — | Pennsylvania |
| 17 | David Tuefel | 8 | Son | — | Pennsylvania |
| 18 | Caroline Tuefel | 5 | Daughter | — | Pennsylvania |
| 19 | Catherine Tuefel | 2 | Daughter | — | Pennsylvania |
| 20 | Calmeroder Hoover | 24 | Head | Salesman | Pennsylvania |
| 21 | Ray S. Hoover | 22 | Wife | — | Pennsylvania |
| 22 | Patricia Hoover | 3 | Daughter | — | Pennsylvania |
| 23 | Emma Hoover | 55 | Mother | — | Pennsylvania |
| 24 | Mary Kephart | 76 | Grandmother | — | Pennsylvania |
| 25 | Allen Hoover | 16 | Brother | N.Y.A. | Pennsylvania |
| 26 | Joseph W. Carvey | 38 | Head | Salesman | Pennsylvania |
| 27 | Virginia Carvey | 37 | Wife | — | Pennsylvania |
| 28 | Joseph Carvey | 2 | Son | — | Pennsylvania |
| 29 | Carina Miller | 57 | Head | Bread Salesman | Pennsylvania |
| 30 | Wallace Miller | 25 | Son | Stenographer | Pennsylvania |
| 31 | Ruth Miller | 23 | Daughter | Elec. Service | Pennsylvania |
| 32 | Edward J. Nicholson | 59 | Head | — | Pennsylvania |
| 33 | Anna C. Nicholson | 54 | Wife | Stenographer | Pennsylvania |
| 34 | Hilda Nicholson | 25 | Daughter | Stenographer | Pennsylvania |
| 35 | Anna Nicholson | 23 | Daughter | Operator | Pennsylvania |
| 36 | Mary Nicholson THIS PERSON | 21 | Daughter | — | Pennsylvania |
| 37 | John Nicholson | 17 | Son | — | Pennsylvania |
| 38 | — | None | — | — | — |
| 39 | Joseph A. Paul | 49 | Head | Bookkeeper | Pennsylvania |
| 40 | Millie Paul | 47 | Wife | — | Pennsylvania |
Pedigree Summary
Mary + 3 siblings
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)