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Helen Mason — 1940 US Census Record
Model Tree available1940 United States Federal Census · Montgomery-County, Pennsylvania
Our Model Tree links this Helen Mason across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Walter & Walter — first a daughter (b.~1921), then head of a 5-person household.
Age 19
b. ~1921
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Pennsylvania |
| Surname | Mason |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Conshohocken |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Conshohocken |
| Est. Birth Year | ~1921 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| Walter Mason | Head | — | 59 | ~1881 |
| Carl Mason | Son | — | 22 | ~1918 |
| Helen Mason | Daughter | — | 19 | ~1921 |
| Eleanor Mason | Spouse | — | 54 | ~1886 |
| Walter Mason | Son | — | 25 | ~1915 |
Census Appearances
1920
Montgomery, Pennsylvania
Daughter, age
Montgomery, Pennsylvania · implied b. ~1920 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Montgomery, Pennsylvania
Daughter, age 9
Montgomery, Pennsylvania · implied b. ~1921 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Montgomery-County, Pennsylvania
Daughter, age 19
Montgomery-County, Pennsylvania · implied b. ~1921 — 5 household members
| Surname | Mason |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Conshohocken |
| 1935 Residence (County) | Montgomery |
| Income (1939) | 0 |
| 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 Mason across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Walter Mason (~0.92 confidence) and father Walter Mason (~0.92 confidence) and father Walter Mason (~0.92 confidence) and mother Eleanor Mason (~0.92 confidence) and mother Eleanor Mason (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Walter Mason
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Walter Mason
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Walter Mason
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Eleanor Mason
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Eleanor Mason
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Mason
Daughter · 1940 · age 19 · b. ~1921 · Pennsylvania
★ You are viewing this record
Sibling
Carl Mason
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Mason
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 — Montgomery-County, Pennsylvania
Open full size
1940 US Federal Census — Montgomery-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03578-00102)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Irene Stempkowski | 39 | Wife | — | Pennsylvania |
| 2 | Phyllis Stempkowski | 19 | Daughter | House Keeper | Pennsylvania |
| 3 | Joseph Stempkowski | 17 | Son | — | Pennsylvania |
| 4 | Walter Stempkowski | 15 | Son | — | Pennsylvania |
| 5 | Irene Stempkowski | 11 | Daughter | — | Pennsylvania |
| 6 | Claire Stempkowski | 8 | Daughter | — | Pennsylvania |
| 7 | Edward Stempkowski | 5 | Son | — | Pennsylvania |
| 8 | Walter Mason | 59 | Head | Tire Maker | Canada English |
| 9 | Eleanor Mason | 54 | Wife | — | Pennsylvania |
| 10 | Walter Jr. Mason | 25 | Son | Steel Worker | Pennsylvania |
| 11 | Carl Mason | 22 | Son | Steel Worker | Pennsylvania |
| 12 | Helen Mason THIS PERSON | 19 | Daughter | — | Pennsylvania |
| 13 | Jennie Blasland | 52 | Head | — | Pennsylvania |
| 14 | Morris Gronbaard | 25 | Son-in-law | Salesman | Pennsylvania |
| 15 | Beatrice Gronbaard | 23 | Daughter | Tabulating | Pennsylvania |
| 16 | John Whip | 32 | Head | Brakeman | Pennsylvania |
| 17 | Florence Whip | 32 | Wife | — | Pennsylvania |
| 18 | Joseph Whip | 4 | Son | — | Pennsylvania |
| 19 | Louis Whip | 1 | Daughter | — | Pennsylvania |
| 20 | Wm. Bortz | 26 | Head | Rubber Worker | Pennsylvania |
| 21 | Francis Bortz | 25 | Wife | Finisher | Pennsylvania |
| 22 | James R. Campbell | 58 | Head | Truck Driver | Pennsylvania |
| 23 | Emma Campbell | 58 | Wife | — | New Jersey |
| 24 | Allen Campbell | 23 | Son | Iron Worker | Pennsylvania |
| 25 | George Gunning | 42 | Head | Tin Smith | Pennsylvania |
| 26 | Sarah Gunning | 34 | Wife | — | Pennsylvania |
| 27 | James Gunning | 13 | Son | — | Pennsylvania |
| 28 | George Jr. Gunning | 10 | Son | — | Pennsylvania |
| 29 | Wm. Gunning | 5 | Son | — | Pennsylvania |
| 30 | Katherine Rowland | 69 | Head | — | Pennsylvania |
| 31 | Carrie Rowland | 42 | Daughter | Twister | Pennsylvania |
| 32 | Mary Rowland | 30 | Daughter-in-law | — | Czechoslovakia |
| 33 | Ellen Rowland | 12 | Grand daughter | — | Pennsylvania |
| 34 | Ruth Rowland | 11 | Grand daughter | — | Pennsylvania |
| 35 | Lena Timer | 41 | Head | Cigar Maker | Hungary |
| 36 | John Timer | 21 | Son | Kitchen | Pennsylvania |
| 37 | Veronica Timer | 18 | Daughter | New Worker | Pennsylvania |
| 38 | Edward Timer | 9 | Son | — | Pennsylvania |
| 39 | Wm. H. Ottman | 33 | Head | Boiler Tester | New Jersey |
| 40 | Elizabeth Ottman | 32 | Wife | — | Pennsylvania |
Pedigree Summary
Helen + 2 siblings
Gen 1 · 5 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)