HP
Helen Parker — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Helen Parker across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Oliver & Anna — first a daughter (b.~1912), then head of a 4-person household.
Age 28
b. ~1912
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Parker |
| Given Name | Helen Marcella M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Port McKeesport |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | laborer |
| Industry | railroad supplies |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 350 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Laborer |
| Township / Ward | Port Mckeesport |
| Est. Birth Year | ~1912 |
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 Helen | Age | Birth yr |
|---|---|---|---|---|
| Helen Parker | Daughter | — | 28 | ~1912 |
| Anna Parker | Head | — | 64 | ~1876 |
| Helen Parker | Daughter | — | 30 | ~1910 |
| John Parker | Son | — | 19 | ~1921 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age 7
Allegheny, Pennsylvania · implied b. ~1913 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Parker |
| Given Name | Helena |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | England |
| Occupation | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 17
Allegheny, Pennsylvania · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Parker |
| Given Name | Helena M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 28
Allegheny-County, Pennsylvania · implied b. ~1912 — 4 household members
| Surname | Parker |
| Given Name | Helen Marcella M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Port McKeesport |
| 1935 Residence (County) | Allegheny |
| Occupation | laborer |
| Industry | railroad supplies |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 350 |
| Highest Grade | No 8 |
| 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 Helen Parker across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Oliver Parker (~0.92 confidence) and mother Anna Parker (~0.92 confidence) and mother Christian Parker (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Oliver Parker
b. ~1869
Source father
● Household
· direct · ~0.92
Mother
Anna Parker
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Christian Parker
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Parker
Daughter · 1940 · age 28 · b. ~1912 · Pennsylvania
★ You are viewing this record
Sibling
John Parker
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Parker
Sibling · 1940 · age 30
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03402-00733)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Daniel Thornton | 44 | Head | Tool Grinder | Pennsylvania |
| 2 | Catherine Thornton | 40 | Wife | — | Pennsylvania |
| 3 | Daniel C. Thornton | 15 | Son | — | Pennsylvania |
| 4 | Lawrence B. Hojick | 52 | Head | Laborer | Austria |
| 5 | Mary Hojick | 48 | Wife | — | Austria |
| 6 | Bertha Hojick | 25 | Daughter | Housework | Pennsylvania |
| 7 | Stanley B. Hojick | 19 | Son | — | Pennsylvania |
| 8 | Harold J. Hojick | 17 | Daughter | — | Pennsylvania |
| 9 | Frank Zawada | 58 | Boarder | Laborer | Austria |
| 10 | Joseph A. Fromell | 42 | Head | Machine Hand | Pennsylvania |
| 11 | Mary B. Fromell | 42 | Wife | — | Pennsylvania |
| 12 | Roger Boot | 50 | Head | Ring Fitter | England |
| 13 | Edith Boot | 50 | Wife | — | England |
| 14 | George A. Boot | 26 | Son | Drill Press | Pennsylvania |
| 15 | Casper Eiler | 82 | Head | — | Germany |
| 16 | Emilie Eiler | 74 | Wife | — | Germany |
| 17 | Anna L. Parker | 64 | Head | — | Pennsylvania |
| 18 | Helen Florence Parker | 30 | Daughter | Laborer | Pennsylvania |
| 19 | Helen Marcella M. Parker THIS PERSON | 28 | Daughter | Laborer | Pennsylvania |
| 20 | John R. Parker | 19 | Son | — | Pennsylvania |
| 21 | Bernard Kirk | 35 | Head | Bench Hand | Pennsylvania |
| 22 | Rosalia Kirk | 29 | Wife | Trimmer | Pennsylvania |
| 23 | Richard B. Barncord | 35 | Head | Trimmer | Pennsylvania |
| 24 | Pearl A. Barncord | 37 | Wife | — | Pennsylvania |
| 25 | Burke H. Barncord | 16 | Son | — | Pennsylvania |
| 26 | Betty M. Barncord | 14 | Daughter | — | Pennsylvania |
| 27 | Richard G. Barncord | 12 | Son | — | Pennsylvania |
| 28 | Edward H. Barncord | 10 | Son | — | Pennsylvania |
| 29 | Laverne M. Barncord | 5 | Daughter | — | Pennsylvania |
| 30 | Merlad Slater | 39 | Head | Crane Man | Pennsylvania |
| 31 | Ethel M. Slater | 39 | Wife | — | Pennsylvania |
| 32 | Merlad E. Jr. Slater | 16 | Son | — | Pennsylvania |
| 33 | Lois E. Slater | 12 | Son | — | Pennsylvania |
| 34 | Clarence A. Slater | 10 | Son | — | Pennsylvania |
| 35 | Joan A. Slater | 6 | Daughter | — | Pennsylvania |
| 36 | Margaret Slater | 4 | Daughter | — | Pennsylvania |
| 37 | Michal A. Mazur | 48 | Head | Laborer | Poland |
| 38 | Catherine T. Mazur | 50 | Wife | — | Poland |
| 39 | Helen V. Mazur | 19 | Daughter | — | Pennsylvania |
| 40 | Joseph P. Mazur | 21 | Son | Gasoline Station Attendant | Pennsylvania |
Related Census Records
Pedigree Summary
Helen + 2 siblings
Gen 1 · 3 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)