JH
James Hamilton — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this James Hamilton across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Archibald & Mary — 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 | Hamilton |
| Given Name | James A |
| 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 | Clerk |
| Industry | Grocery Store |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1008 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Clerk |
| 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 James | Age | Birth yr |
|---|---|---|---|---|
| Lillian Hamilton | Daughter | — | 19 | ~1921 |
| Violet Hamilton | Daughter | — | 15 | ~1925 |
| Thomas Hamilton | Head | — | 47 | ~1893 |
| James Hamilton | Son | — | 25 | ~1915 |
| Sarah Hamilton | Spouse | — | 47 | ~1893 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 3
Allegheny, Pennsylvania · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | James A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Pennsylvania |
| Mother Tongue | English |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 14
Allegheny, Pennsylvania · implied b. ~1916 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | James A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Scotland |
| 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 | Hamilton |
| Given Name | James A |
| 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 | Clerk |
| Industry | Grocery Store |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1008 |
| 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 James Hamilton across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Archibald Hamilton (~0.92 confidence) and mother Mary Hamilton (~0.92 confidence) and father Thomas Hamilton (~0.92 confidence) and mother Sarah Hamilton (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Archibald Hamilton
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Mary Hamilton
b. ~1892
Source mother
● Household
· direct · ~0.92
Father
Thomas Hamilton
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Sarah Hamilton
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Hamilton
Son · 1940 · age 25 · b. ~1915 · Pennsylvania
★ You are viewing this record
Sibling
Lillian Hamilton
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Violet Hamilton
Sibling · 1940 · age 15
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-t0627-03670-00670)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas Hamilton | 47 | Head | Shoe Machine | Northern Ireland |
| 42 | Sarah B Hamilton | 47 | Wife | Housewife | Scotland |
| 43 | James A Hamilton THIS PERSON | 25 | Son | Clerk | Pennsylvania |
| 44 | Lillian F Hamilton | 19 | Daughter | New Worker | Pennsylvania |
| 45 | Violet Jean Hamilton | 15 | Daughter | — | Pennsylvania |
| 46 | John E Aiken | 53 | Head | Steam Fitter | Pennsylvania |
| 47 | Margaret B Aiken | 51 | Wife | Housewife | Pennsylvania |
| 48 | John C Aiken | 27 | Son | Shipping Clerk | Pennsylvania |
| 49 | John J Aiken | 26 | Son | Truck Driver | Pennsylvania |
| 50 | James E Aiken | 23 | Son | Laborer | Pennsylvania |
| 51 | Lawrence E Aiken | 19 | Son | New Worker | Pennsylvania |
| 52 | Marie E Fleming | 40 | Head | Housewife | Ohio |
| 53 | Arthur J Fleming | 24 | Son | Clerk | Pennsylvania |
| 54 | Harold H Fleming | 23 | Son | Mechanic | Pennsylvania |
| 55 | Ronald E Fleming | 14 | Son | — | Pennsylvania |
| 56 | Matilda Kelley | 71 | Mother | — | Pennsylvania |
| 57 | Chesley E Paden | 36 | Head | Truck Driver | Tennessee |
| 58 | Mildred L Paden | 30 | Wife | — | Pennsylvania |
| 59 | Michael Fadel | 38 | Head | Watchman | Pennsylvania |
| 60 | Mary C Fadel | 40 | Wife | — | Pennsylvania |
| 61 | Howard Knight | 34 | Head | Clerk | Pennsylvania |
| 62 | Mary R Knight | 27 | Wife | — | Pennsylvania |
| 63 | There Block | 73 | #15 | — | Pennsylvania |
| 64 | Charles L Chagle | 25 | Head | Stockman | Pennsylvania |
| 65 | Pauline A Chagle | 20 | Wife | — | West Virginia |
| 66 | Carl Edw. Price | 23 | Head | Body Maker | West Virginia |
| 67 | Viola L Price | 21 | Wife | — | West Virginia |
| 68 | Carl E Jr. Price | 2 | Son | — | Pennsylvania |
| 69 | Shirley L Price | 1 | Daughter | — | Pennsylvania |
| 70 | George S Elinger | 48 | Head | Machinist | Pennsylvania |
| 71 | Martha M Elinger | 45 | Wife | — | Pennsylvania |
| 72 | Hazel Jane Elinger | 14 | Daughter | — | Pennsylvania |
| 73 | George B Elinger | 12 | Son | — | Pennsylvania |
| 74 | William H Elinger | 8 | Son | — | Pennsylvania |
| 75 | George W Funk | 58 | Head | Laborer | Pennsylvania |
| 76 | Elizabeth M Funk | 34 | Wife | Bundler | Pennsylvania |
| 77 | Anna M Funk | 57 | Wife | — | Pennsylvania |
| 78 | Howard L Funk | 26 | Son | Laborer | Pennsylvania |
| 79 | Samuel H Funk | 24 | Son | New Worker | Pennsylvania |
| 80 | George Bell | 73 | Head | — | Virginia |
Pedigree Summary
James + 2 siblings
Gen 1 · 4 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)