JD
John Dyer — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this John Dyer across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents John & Ida — first a head (b.~1910), then head of a 3-person household.
Age 30
b. ~1910
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Dyer |
| Given Name | John D |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Surveyor |
| Industry | Survey Dept |
| Class of Worker | GW |
| Hours Worked | 43 |
| Income (1939) | 1980 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Surveyor |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1910 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Sylvia Dyer | Spouse | — | 28 | ~1912 |
| John Dyer | Son | — | 2 | ~1938 |
| John Dyer | Head | — | 30 | ~1910 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 9
Allegheny, Pennsylvania · implied b. ~1911 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dyer |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 19
Allegheny, Pennsylvania · implied b. ~1911 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dyer |
| Given Name | John R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Truck driver |
| Industry | County |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 30
Allegheny-County, Pennsylvania · implied b. ~1910 — 3 household members
| Surname | Dyer |
| Given Name | John D |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Surveyor |
| Industry | Survey Dept |
| Class of Worker | GW |
| Hours Worked | 43 |
| Income (1939) | 1980 |
| Highest Grade | H-2 |
| 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 John Dyer across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Dyer (~0.92 confidence) and mother Ida Dyer (~0.92 confidence) and mother Anna Dyer (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Dyer
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Ida Dyer
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Anna Dyer
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Dyer
Head · 1940 · age 30 · b. ~1910 · Pennsylvania
★ 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 — 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-t0627-03666-00573)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John D Dyer THIS PERSON | 30 | Head | Surveyor | Pennsylvania |
| 2 | Sylvia Dyer | 28 | Wife | — | Pennsylvania |
| 3 | John Dyer | 2 | Son | — | Pennsylvania |
| 4 | Joseph Lacco | 31 | Head | Salesman | Pennsylvania |
| 5 | Dilla S Lacco | 29 | Wife | — | Pennsylvania |
| 6 | Jacqulina Lacco | 1 | Daughter | — | Pennsylvania |
| 7 | John Voelkel | 65 | Head | Laborer | Pennsylvania |
| 8 | John Voelkel | 31 | Son | Purchasing Agent | Pennsylvania |
| 9 | Mary Voelkel | 23 | Daughter | Typewriter | Pennsylvania |
| 10 | Albert J Voelkel | 20 | Son | — | Pennsylvania |
| 11 | Joseph M Rauber | 32 | Head | Cashier | Pennsylvania |
| 12 | Dolores Rauber | 27 | Wife | — | Pennsylvania |
| 13 | I Da Yochum | 46 | Head | — | Pennsylvania |
| 14 | Rita Yochum | 22 | Daughter | Clerk | Pennsylvania |
| 15 | George H Roellinger | 48 | Head | Laborer | Pennsylvania |
| 16 | Rose C Roellinger | 49 | Wife | — | Pennsylvania |
| 17 | George W Roellinger | 25 | Son | Laborer | Pennsylvania |
| 18 | Edna M Roellinger | 24 | Daughter | Salesgirl | Pennsylvania |
| 19 | Elmer Roellinger | 23 | Son | — | Pennsylvania |
| 20 | John G Trapp | 58 | Head | — | West Virginia |
| 21 | Theresa M Trapp | 56 | Wife | — | Pennsylvania |
| 22 | Raymond J Trapp | 27 | Son | Salesman | Pennsylvania |
| 23 | Mildred Grim | 34 | Daughter | Candy Wrapper | Pennsylvania |
| 24 | Shirley Grim | 5 | Daughter | — | Pennsylvania |
| 25 | Edward Brose | 27 | Cousin | Houseman | Pennsylvania |
| 26 | Dominick Romanelli | 32 | Head | Floor Man | Pennsylvania |
| 27 | Sarah D Romanelli | 33 | Wife | — | Ireland |
| 28 | James Romanelli | 10 | Son | — | Pennsylvania |
| 29 | Patricia A Romanelli | 2 | Daughter | — | Pennsylvania |
| 30 | Jacob H Miller | 34 | Head | Truck Driver | Pennsylvania |
| 31 | Wilda Miller | 34 | Wife | — | Pennsylvania |
| 32 | Regis Miller | 14 | Son | — | Pennsylvania |
| 33 | Joseph Miller | 11 | Son | — | Pennsylvania |
| 34 | Mary Dolira | 79 | Head | — | Germany |
| 35 | Albert Froetchel | 49 | Head | Pattern Maker | Pennsylvania |
| 36 | Edna D Froetchel | 30 | Wife | — | West Virginia |
| 37 | Robert Froetchel | 8 | Son | — | Pennsylvania |
| 38 | Anna M Miller | 56 | Head | Janitress | Pennsylvania |
| 39 | Cyril Miller | 25 | Son | Laborer | Pennsylvania |
| 40 | Irene G Miller | 19 | Daughter | Stock Girl | Pennsylvania |
Related Census Records
Pedigree Summary
John
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)