JB
John Boyd — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this John Boyd across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Mary & John — first a son (b.~1915), then head of a 5-person household.
Age 25
b. ~1915
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Boyd |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Steno. |
| Industry | Metals Office |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 720 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Steno. |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1915 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| May Boyd | Daughter | — | 28 | ~1912 |
| Lottie Boyd | Daughter | — | 27 | ~1913 |
| John Boyd | Head | — | 52 | ~1888 |
| John Boyd | Son | — | 25 | ~1915 |
| Mary Boyd | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 4
Allegheny, Pennsylvania · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Boyd |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Mother Tongue | English |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 13
Allegheny, Pennsylvania · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Boyd |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| 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
Allegheny-County, Pennsylvania
Son, age 25
Allegheny-County, Pennsylvania · implied b. ~1915 — 5 household members
| Surname | Boyd |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Steno. |
| Industry | Metals Office |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 720 |
| Highest Grade | H-4 |
| 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 Boyd across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mary Boyd (~0.92 confidence) and father John Boyd (~0.92 confidence) and father William Boyd (~0.92 confidence) and father Alexander Boyd (~0.92 confidence) and mother Elizabeth Boyd (~0.92 confidence) and mother Pauline Boyd (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Boyd
b. ~1885
Source mother
● Household
· direct · ~0.92
Father
John Boyd
b. ~1888
Source father
● Household
· direct · ~0.92
Father
William Boyd
b. ~1892
Source father
● Household
· direct · ~0.92
Father
Alexander Boyd
b. ~1895
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Boyd
b. ~1896
Source mother
● Household
· direct · ~0.92
Mother
Pauline Boyd
b. ~1899
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Boyd
Son · 1940 · age 25 · b. ~1915 · Pennsylvania
★ You are viewing this record
Sibling
Lottie Boyd
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
May Boyd
Sibling · 1940 · age 28
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 — 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-t0627-03676-00069)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lillian H. Alleman | 45 | Wife | Steno | Pennsylvania |
| 42 | Lillian B. Wallace | 73 | Mother-in-law | — | Pennsylvania |
| 43 | Anna B. Valate | 54 | Head | Lace Tea Room | Pennsylvania |
| 44 | Lyman Reese | 48 | Lodger | Machine Hand | Pennsylvania |
| 45 | Minerva Reese | 43 | Lodger | — | Pennsylvania |
| 46 | Lodger Lyman | None | M | — | — |
| 47 | Lodger Raymond | None | M | — | — |
| 48 | Lodger Alma M. | None | F | — | — |
| 49 | Benjamin Valate | 27 | Lodger | Laborer | Pennsylvania |
| 50 | Rhoda Valate | 19 | Lodger | — | Pennsylvania |
| 51 | Lawrence Valate | 24 | Lodger | Core Maker | Pennsylvania |
| 52 | Laura Valate | 22 | Lodger | — | Pennsylvania |
| 53 | John Boyd | 52 | Head | Carpenter | Scotland |
| 54 | Mary Boyd | 55 | Wife | — | Scotland |
| 55 | May Boyd | 28 | Daughter | Steno. | Pennsylvania |
| 56 | Lottie Boyd | 27 | Daughter | Steno. | Pennsylvania |
| 57 | John Boyd THIS PERSON | 25 | Son | Steno. | Pennsylvania |
| 58 | Otto Kessler | 35 | Head | Hardware Dealer | Pennsylvania |
| 59 | Virginia Kessler | 36 | Wife | — | Pennsylvania |
| 60 | Phillip Kessler | 9 | Son | — | Pennsylvania |
| 61 | Joyce Kessler | 7 | Daughter | — | Pennsylvania |
| 62 | David Kessler | 5 | Son | — | Pennsylvania |
| 63 | Henry Kessler | 1 | Son | — | Pennsylvania |
| 64 | Charlotte Kessler | 0 | Daughter | — | Pennsylvania |
| 65 | — | None | — | — | — |
| 66 | Benie Lunkawak | 51 | Head | — | Austria |
| 67 | Nick Lunkawak | 25 | Son | Trucker | Ohio |
| 68 | Mike Lunkawak | 22 | Son | Trucker | Pennsylvania |
| 69 | Pauline Lunkawak | 19 | Daughter | Maker Up | Pennsylvania |
| 70 | Dorothy Lunkawak | 16 | Daughter | New Worker | Pennsylvania |
| 71 | Charles Lunkawak | 13 | Son | — | Pennsylvania |
| 72 | Henry Fisher | 55 | Head | Carpenter | Pennsylvania |
| 73 | Anna K. Fisher | 44 | Wife | — | Pennsylvania |
| 74 | Harry P. Fisher | 8 | Son | — | Pennsylvania |
| 75 | Edward Aland | 40 | Head | Hot Mill Clerk | Pennsylvania |
| 76 | Marie C. Aland | 41 | Wife | — | Pennsylvania |
| 77 | George S. Reese | 71 | Head | — | Pennsylvania |
| 78 | Maude Reese | 65 | Wife | — | Pennsylvania |
| 79 | Henry C. Reese | 35 | Son | Salesman | Pennsylvania |
| 80 | Josephine Reese | 30 | Daughter-in-law | — | Pennsylvania |
Pedigree Summary
John + 2 siblings
Gen 1 · 6 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)