JD
John Donaldson — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Allegheny, Pennsylvania
Our Model Tree links this John Donaldson across the 1910, 1920, 1930 and 1940 US Censuses in Allegheny, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1871), then head of a 4-person household.
Age 59
b. ~1871
Male
Head
Born: Pennsylvania
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Allegheny, Pennsylvania |
| Surname | Donaldson |
| Given Name | John S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 33 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Ohio |
| Additional Details | |
| Occupation | Doctor |
| Industry | Medical |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 35000 |
| Radio Set | R |
| Veteran | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Doctor |
| Township / Ward | Bellevue Borough |
| Est. Birth Year | ~1871 |
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 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Donaldson | Head | — | 59 | ~1871 |
| Ida Donaldson | Spouse | — | 50 | ~1880 |
| Rodgers Donaldson | Son | — | 21 | ~1909 |
| John Donaldson | Son | — | 24 | ~1906 |
Census Appearances
1910
Allegheny, Pennsylvania
Head, age 38
Allegheny, Pennsylvania · implied b. ~1872 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donaldson |
| Given Name | John F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Years Married | 5 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Ohio |
| Occupation | Physician |
| Industry | General Practice |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Allegheny, Pennsylvania
Head, age 49
Allegheny, Pennsylvania · implied b. ~1871 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donaldson |
| Given Name | John S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Ohio |
| Occupation | Physician |
| Industry | Medical |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Head, age 59
Allegheny, Pennsylvania · implied b. ~1871 — 4 household members
| Surname | Donaldson |
| Given Name | John S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 33 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Ohio |
| Occupation | Doctor |
| Industry | Medical |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 35000 |
| Radio Set | R |
| Veteran | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 69
Allegheny-County, Pennsylvania · implied b. ~1871 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donald |
| Given Name | John A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 69 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Sewickley Boro |
| 1935 Residence (County) | Allegheny |
| Occupation | Contracting Plasterer |
| Industry | Own Business |
| Class of Worker | E |
| Hours Worked | 16 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| 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 Donaldson across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Donaldson
Head · 1930 · age 59 · b. ~1871 · 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:fifteenthcensus00reel1960:0342)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Alma Niedermyer | 56 | Lodger | — | Germany |
| 52 | George J. Reilly | 37 | Head | Tailor | Pennsylvania |
| 53 | Amelia Reilly | 30 | Wife | — | Pennsylvania |
| 54 | George J. Jr. Reilly | 8 | Son | — | Pennsylvania |
| 55 | Ruth Reilly | 3 | Daughter | — | Pennsylvania |
| 56 | Thomas D. Bigley | 67 | Head | Policeman | Pennsylvania |
| 57 | Myrtle Bigley | 40 | Daughter | Nurse | Pennsylvania |
| 58 | Rollins B. Fletcher | 42 | Son-in-law | Collector | Pennsylvania |
| 59 | Jean Fletcher | 36 | Daughter | — | Pennsylvania |
| 60 | Mary Elizabeth Fletcher | 9 | Granddaughter | — | Pennsylvania |
| 61 | Margaret J. Fletcher | 8 | Granddaughter | — | Pennsylvania |
| 62 | Joseph G. Herr | 47 | Head | Agent | Pennsylvania |
| 63 | Augusta M. Herr | 46 | Wife | — | Pennsylvania |
| 64 | Virginia Herr | 23 | Daughter | Stenographer | Pennsylvania |
| 65 | Gertrude Herr | 20 | Daughter | Stenographer | Pennsylvania |
| 66 | Joseph G. Jr. Herr | 17 | Son | — | Pennsylvania |
| 67 | Ruth Herr | 15 | Daughter | — | Pennsylvania |
| 68 | Robert Herr | 10 | Son | — | Pennsylvania |
| 69 | Margaret Herr | 7 | Daughter | — | Pennsylvania |
| 70 | Alice Herr | 5 | Daughter | — | Pennsylvania |
| 71 | Dorothy Mckay | 38 | Head | Clerk | Pennsylvania |
| 72 | Margaret Mckay | 35 | Sister | — | Pennsylvania |
| 73 | Sarah Mckay | 33 | Sister | Nurse | Pennsylvania |
| 74 | Anna Ernest | 67 | Head | — | Pennsylvania |
| 75 | Ethel Gumbruch | 33 | Daughter | Clerk | Pennsylvania |
| 76 | John S. Donaldson THIS PERSON | 59 | Head | Doctor | Pennsylvania |
| 77 | Ida Donaldson | 50 | Wife | — | Pennsylvania |
| 78 | John Donaldson | 24 | Son | — | Pennsylvania |
| 79 | Rodgers Donaldson | 21 | Son | — | Pennsylvania |
| 80 | Katie Roethlein | 37 | Head | Seamstress | New Hampshire |
| 81 | Benedict Roethlein | 14 | Son | — | Virginia |
| 82 | Agnes Sister Downey | 70 | Head | Teacher | Pennsylvania |
| 83 | Eusebius Sister Young | 40 | Lodger | Teacher | Pennsylvania |
| 84 | Gualberta Sister Boyle | 32 | Lodger | Teacher | Pennsylvania |
| 85 | Frances Marie Sister Wood | 31 | Lodger | Teacher | Pennsylvania |
| 86 | Delores Sister Mckenney | 32 | Lodger | Teacher | Pennsylvania |
| 87 | Maria Blandina Sister Dougherty | 23 | Lodger | Teacher | Pennsylvania |
| 88 | Estelle Sister Richards | 22 | Lodger | Teacher | Pennsylvania |
| 89 | Vincent Marie Sister Barry | 21 | Lodger | Teacher | Pennsylvania |
| 90 | Delphine Sister Gazzolo | 21 | Lodger | Teacher | Pennsylvania |
| 91 | Max Wingert | 42 | Head | Dentist | Pennsylvania |
| 92 | Esther Wingert | 41 | Wife | — | Pennsylvania |
| 93 | Donald Wingert | 8 | Son | — | Pennsylvania |
| 94 | Lloyd Wingert | 6 | Son | — | Pennsylvania |
| 95 | John Masten | 38 | Head | Salesman | Kentucky |
| 96 | Gertrude Masten | 33 | Wife | — | Pennsylvania |
| 97 | Jean Masten | 8 | Daughter | — | Pennsylvania |
| 98 | Virginia Masten | 6 | Daughter | — | Pennsylvania |
| 99 | Stella Garlick | 20 | Maid | Servant | Pennsylvania |
| 100 | Marcella Nevins | 38 | Head | — | 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)