JM
John Mcdonald — 1940 US Census Record
Model Tree available1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this John Mcdonald across the 1920, 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Rose — first a head (b.~1899), then head of a 7-person household.
Age 41
b. ~1899
Male
Head
Born: Penna
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | McDonald |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Penna |
| 1935 Residence (City) | PHILA CITY |
| 1935 Residence (County) | PHILA. |
| Additional Details | |
| Occupation | Policeman |
| Industry | Phila. Police Force |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 2184 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
| Occupation | Policeman |
| Township / Ward | Phila City |
| Est. Birth Year | ~1899 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mcdonald | Daughter | — | 4 | ~1936 |
| Katherine Mcdonald | Daughter | — | 1 | ~1939 |
| Theresa Mcdonald | Daughter | — | 15 | ~1925 |
| John Mcdonald | Head | — | 41 | ~1899 |
| Charles Elkins | Other | — | 15 | ~1925 |
| Arthur Elkins | Other | — | 17 | ~1923 |
| Anna Mcdonald | Spouse | — | 37 | ~1903 |
Census Appearances
1920
Philadelphia, Pennsylvania
Son, age 19
Philadelphia, Pennsylvania · implied b. ~1901 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonough |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Penna |
| Father's Birthplace | Penna |
| Mother's Birthplace | Penna |
| Occupation | Electrician |
| Industry | Elec Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1930
Philadelphia, Pennsylvania
Head, age 30
Philadelphia, Pennsylvania · implied b. ~1900 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonough |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Penna |
| Age at First Marriage | 30 |
| Father's Birthplace | Penna |
| Mother's Birthplace | Penna |
| Occupation | Policeman |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 20 |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1940
Philadelphia-County, Pennsylvania
Head, age 41
Philadelphia-County, Pennsylvania · implied b. ~1899 — 7 household members
| Surname | McDonald |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Penna |
| 1935 Residence (City) | PHILA CITY |
| 1935 Residence (County) | PHILA. |
| Occupation | Policeman |
| Industry | Phila. Police Force |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 2184 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
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 Mcdonald across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Rose Mcdonough (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Rose Mcdonough
b. ~1862
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mcdonald
Head · 1940 · age 41 · b. ~1899 · 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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03728-00315)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John F. Mcdonald THIS PERSON | 41 | Head | Policeman | Penna |
| 42 | Anna Mcdonald | 37 | Wife | — | Penna |
| 43 | Theresa Mcdonald | 15 | Daughter | — | Penna |
| 44 | Margaret Mcdonald | 4 | Daughter | — | Penna |
| 45 | Katherine Mcdonald | 1 | Daughter | — | Penna |
| 46 | Arthur Elkins | 17 | Step son | New Worker | Penna |
| 47 | Charles Elkins | 15 | Step son | — | Penna |
| 48 | Roy Wissman, Roy | 38 | Head | Painter | Penna |
| 49 | Louise B. Wissman, Roy | 41 | Wife | — | Penna |
| 50 | Roy Wissman, Roy | 14 | Son | — | Penna |
| 51 | Richard Wissman, Roy | 10 | Son | — | Penna |
| 52 | John Ostertig | 35 | Head | Floor Carpet Laying | Penna |
| 53 | Helen Ostertig | 36 | Wife | — | New Jersey |
| 54 | Joseph Ostertig | 11 | Son | — | Penna |
| 55 | Charles F. Schiller | 50 | Head | Detective | Penna |
| 56 | Claudine Schiller | 42 | Wife | — | France |
| 57 | Charlotte Schiller | 7 | Daughter | — | Penna |
| 58 | John Smyth | 44 | Head | Shipwright | Scotland |
| 59 | Mary Smyth | 41 | Wife | — | Scotland |
| 60 | Marie Smyth | 13 | Daughter | — | Penna |
| 61 | Joseph Smyth | 12 | Son | — | Penna |
| 62 | Theresa Smyth | 6 | Daughter | — | Penna |
| 63 | John Jr. Smyth | 3 | Son | — | Penna |
| 64 | Mary Kean | 75 | Mother-in-law | — | Scotland |
| 65 | Harry Sandom | 35 | Head | Clerk | Penna |
| 66 | Marion Sandom | 32 | Wife | — | Penna |
| 67 | June Sandom | 6 | Daughter | — | Penna |
| 68 | Doris Sandom | 3 | Daughter | — | Penna |
| 69 | Dora M. Crooke | 43 | Head | Demonstrator | Penna |
| 70 | Chester A. Hornet | 3 | Lodger | Clerk | New Jersey |
| 71 | Albert Masters | 38 | Head | Engineer | Penna |
| 72 | Winifred Masters | 35 | Wife | — | Penna |
| 73 | Thomas Masters | 15 | Son | — | Penna |
| 74 | Cardinal Masters | 11 | Son | — | Penna |
| 75 | Virginia Masters | 8 | Daughter | — | Penna |
| 76 | Joseph Hall | 44 | Head | Salesman | Iowa |
| 77 | Fern Hall | 39 | Wife | — | Vermont |
| 78 | Richard Hall | 14 | Son | — | Penna |
| 79 | Robert Hall | 11 | Son | — | Penna |
| 80 | Regina Rafferty | 40 | Head | Clerk | Penna |
Pedigree Summary
John
Gen 1 · 1 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)