MC
Mary Conrad — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Washington-County, Pennsylvania
Our Model Tree links this Mary Conrad across the 1930 and 1940 US Censuses in Washington-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 8-person household.
Age 13
b. ~1927
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Pennsylvania |
| Surname | Conrad |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Washington |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Highest Grade | Hs 6 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Ellsworth Borough |
| Est. Birth Year | ~1927 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| William Conrad | Son | — | 3 | ~1937 |
| Julia Conrad | Daughter | — | 1 | ~1939 |
| Arbell Conrad | Daughter | — | 10 | ~1930 |
| Arbell Conrad | Spouse | — | 37 | ~1903 |
| Violet Conrad | Daughter | — | 6 | ~1934 |
| Andrew Conrad | Son | — | 8 | ~1932 |
| Margaret Conrad | Daughter | — | 13 | ~1927 |
| Mary Conrad | Daughter | — | 13 | ~1927 |
Census Appearances
1930
Washington, Pennsylvania
Daughter, age 3
Washington, Pennsylvania · implied b. ~1927 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Conrad |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | New York |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Washington-County, Pennsylvania
Daughter, age 13
Washington-County, Pennsylvania · implied b. ~1927 — 8 household members
| Surname | Conrad |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Washington |
| 1935 Residence (County) | Washington |
| Highest Grade | Hs 6 |
| 1935 Residence | Pennsylvania |
| 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 Conrad across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Conrad
Daughter · 1940 · age 13 · b. ~1927 · Pennsylvania
★ You are viewing this record
Sibling
Arbell Conrad
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julia Conrad
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Conrad
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Conrad
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Andrew Conrad
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Violet Conrad
Sibling · 1940 · age 6
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 — Washington-County, Pennsylvania
Open full size
1940 US Federal Census — Washington-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03623-00425)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arbell Conrad | 37 | Wife | — | Pennsylvania |
| 2 | Mary Conrad THIS PERSON | 13 | Daughter | — | Pennsylvania |
| 3 | Margaret Conrad | 13 | Daughter | — | Pennsylvania |
| 4 | Arbell Conrad | 10 | Daughter | — | Pennsylvania |
| 5 | Andrew Conrad | 8 | Son | — | Pennsylvania |
| 6 | Violet Conrad | 6 | Daughter | — | Pennsylvania |
| 7 | William Conrad | 3 | Son | — | Pennsylvania |
| 8 | Julia Conrad | 1 | Daughter | — | Pennsylvania |
| 9 | Leslie Brendt | 34 | Head | Coal Cutter | Virginia |
| 10 | Sophie Brendt | 35 | Wife | — | Pennsylvania |
| 11 | Edward Brendt | 11 | Son | — | Pennsylvania |
| 12 | Jack Brendt | 11 | Son | — | Pennsylvania |
| 13 | Nellie Brendt | 10 | Daughter | — | Pennsylvania |
| 14 | Earle Brendt | 7 | Son | — | Pennsylvania |
| 15 | William Brendt | 2 | Son | — | Pennsylvania |
| 16 | George Daniloff | 25 | Head | Miner | Pennsylvania |
| 17 | Frances Daniloff | 24 | Wife | — | Pennsylvania |
| 18 | Mark Daniloff | 1 | Son | — | Pennsylvania |
| 19 | Roy Clark | 31 | Head | Pumper | West Virginia |
| 20 | Katherine Clark | 30 | Wife | — | Poland |
| 21 | Roy Jr. Clark | 12 | Son | — | Pennsylvania |
| 22 | Colleen Clark | 8 | Daughter | — | Pennsylvania |
| 23 | John D. Labant | 28 | Head | Miner | Pennsylvania |
| 24 | Hedwig Labant | 21 | Wife | — | Pennsylvania |
| 25 | Frank Kristoff | 58 | Father-in-law | — | Austria |
| 26 | George Daniloff | 60 | Head | Miner | Poland |
| 27 | Katherine Daniloff | 53 | Wife | — | Poland |
| 28 | Harry Daniloff | 23 | Son | Miner | Pennsylvania |
| 29 | Stella Daniloff | 21 | Daughter | Housekeeper | Pennsylvania |
| 30 | Samuel Daniloff | 19 | Son | Miner | Pennsylvania |
| 31 | Louie Daniloff | 17 | Son | — | Pennsylvania |
| 32 | Mary Daniloff | 11 | Daughter | — | Pennsylvania |
| 33 | John D. Ronych | 52 | Head | Miner | Czechoslovakia |
| 34 | Frank Matha | 52 | Head | Miner | Czechoslovakia |
| 35 | John Ronych | 26 | Head | Miner | Pennsylvania |
| 36 | Andy Tebah | 49 | Head | Miner | Czechoslovakia |
| 37 | Steve Bryce | 58 | Head | — | Czechoslovakia |
| 38 | George Nicholas | 47 | Head | Miner | West Virginia |
| 39 | Verna Nicholas | 36 | Wife | — | West Virginia |
| 40 | Geraldine Nicholas | 14 | Daughter | — | West Virginia |
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)