JD
John Douglas — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Allegheny, Pennsylvania
Our Model Tree links this John Douglas across the 1910, 1920, 1930 and 1940 US Censuses in Allegheny, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 5-person household.
Age 45
b. ~1885
Male
Head
Born: Pennsylvania
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Allegheny, Pennsylvania |
| Surname | Douglas |
| Given Name | John S |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 22 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Occupation | Chemist |
| Industry | Steel Mills |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 40 |
| Radio Set | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Chemist |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1885 |
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 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Helen Douglas | Daughter | — | 21 | ~1909 |
| John Douglas | Head | — | 45 | ~1885 |
| Ada Sooch | Other | — | 73 | ~1857 |
| Alice Douglas | Other | — | 45 | ~1885 |
| John Douglas | Son | — | 17 | ~1913 |
Census Appearances
1910
Allegheny, Pennsylvania
Head, age 25
Allegheny, Pennsylvania · implied b. ~1885 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Douglas |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Years Married | 2 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Chemist |
| Industry | Steel Co. |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Allegheny, Pennsylvania
Head, age 35
Allegheny, Pennsylvania · implied b. ~1885 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Douglas |
| Given Name | John S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Chemist |
| Industry | Iron and Steel |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Head, age 45
Allegheny, Pennsylvania · implied b. ~1885 — 5 household members
| Surname | Douglas |
| Given Name | John S |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 22 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Chemist |
| Industry | Steel Mills |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 40 |
| Radio Set | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 55
Allegheny-County, Pennsylvania · implied b. ~1885 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Douglass |
| Given Name | John S |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Chemist |
| Industry | Steel Mill |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 3000 |
| Highest Grade | No 5 |
| 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 Douglas across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Douglas
Head · 1930 · age 45 · b. ~1885 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Allegheny, Pennsylvania
Open full size
1930 US Federal Census — Allegheny, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel1970:0984)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Sabina Emmerich | 27 | Head | Machinist | Germany |
| 52 | Ruth L Emmerich | 23 | Wife-H | — | Pennsylvania |
| 53 | Ruth R Emmerich | 0 | Daughter | — | Pennsylvania |
| 54 | William E Emmerich | 1 | Son | — | Pennsylvania |
| 55 | Edward S Jr Pace | 44 | Head | Salesman | Pennsylvania |
| 56 | Beatrice Pace | 31 | Wife-H | — | West Virginia |
| 57 | Edward S 3Rd Pace | 11 | Son | — | Pennsylvania |
| 58 | Hilda A Granger | 46 | Head-H | Manager | Louisiana |
| 59 | Genevieve J Granger | 17 | Sister | Messenger | Pennsylvania |
| 60 | Pearl A Gross | 53 | Head-H | Baker | Indiana |
| 61 | John E Mcclafferty | 33 | Son | Commercial Sales | Ohio |
| 62 | Margaret B Bakonyar | 50 | Head | Janitress | Pennsylvania |
| 63 | James Leonard | 50 | Head | Foreman | England |
| 64 | Edith E Leonard | 45 | Wife-H | — | England |
| 65 | Edith L Leonard | 22 | Daughter | Stenographer | England |
| 66 | James J Leonard | 20 | Son | Student | England |
| 67 | Doris J Leonard | 18 | Daughter | Stenographer | England |
| 68 | Gertrude M Leonard | 7 | Daughter | — | Pennsylvania |
| 69 | Almer F Sauer | 26 | Head | Attendant | Pennsylvania |
| 70 | Gertrude M Sauer | 25 | Wife-H | — | West Virginia |
| 71 | Joan L Sauer | 2 | Daughter | — | Pennsylvania |
| 72 | Almer Jr Sauer | 0 | Son | — | Pennsylvania |
| 73 | Rose Wilsh | 60 | Mother-in-law | Sales Lady | Ohio |
| 74 | Arthur (Ab) Rose | 30 | Brother-in-law | — | Ohio |
| 75 | Leona E Spiker | 23 | Daughter-in-law | — | West Virginia |
| 76 | William W Spiker | 2 | Grandson | — | Pennsylvania |
| 77 | Dorothy G Haberly | 15 | Granddaughter | — | Ohio |
| 78 | Samuel S Mcbride | 43 | Head | Bookkeeper | Pennsylvania |
| 79 | Annie Mcbride | 43 | Wife-H | — | Pennsylvania |
| 80 | Sara E Mcbride | 14 | Daughter | — | Pennsylvania |
| 81 | Henry L Spitzer | 58 | Lodger | Upholsterer | Czechoslovakia |
| 82 | Mary E Erdman | 18 | Lodger | Operator | Pennsylvania |
| 83 | Thomas W Verner | 54 | Head | Fireman | North Ireland |
| 84 | Ellen Verner | 48 | Wife-H | — | North Ireland |
| 85 | Clarence S Verner | 22 | Son | Clerk | Pennsylvania |
| 86 | Sarah E Verner | 20 | Daughter | — | Pennsylvania |
| 87 | Robert J Verner | 18 | Son | — | Pennsylvania |
| 88 | Charles E James | 22 | Head | Painter | Pennsylvania |
| 89 | Hulda B James | 20 | Wife-H | — | Pennsylvania |
| 90 | John S Douglas THIS PERSON | 45 | Head | Chemist | Pennsylvania |
| 91 | Alice M Douglas | 45 | Wife-H | — | Pennsylvania |
| 92 | Helen A Douglas | 21 | Daughter | Teacher | Pennsylvania |
| 93 | John S Jr Douglas | 17 | Son | — | Pennsylvania |
| 94 | Ada M Sooch | 73 | Mother-in-law | — | Pennsylvania |
| 95 | James Brown | 52 | Head | Installer | Scotland |
| 96 | Christina M Brown | 52 | Wife-H | — | Pennsylvania |
| 97 | Margaret M Brown | 32 | Daughter | Stenographer | Pennsylvania |
| 98 | Helen M Brown | 29 | Daughter | Stenographer | Pennsylvania |
| 99 | Lillian C Brown | 24 | Daughter | Stenographer | Pennsylvania |
| 100 | Robert A Lynch | 34 | Lodger | Messenger | Pennsylvania |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)