JM
James Mack — 1920 US Census Record
Model Tree available1920 United States Federal Census · Allegheny, Pennsylvania
Our Model Tree links this James Mack across the 1920, 1930 and 1940 US Censuses in Allegheny, Pennsylvania (XGBoost, ~Confirmed), with identified parents John & Michael — first a son (b.~1915), then head of a 8-person household.
Age 5
b. ~1915
Male
Son
Born: Pennsylvania
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Allegheny, Pennsylvania |
| Surname | Mack |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Mckeesport City |
| 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.
8 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Mack | Son | — | 5 | ~1915 |
| Robert Mack | Son | — | 1 | ~1919 |
| Margaret Mack | Daughter | — | 3 | ~1917 |
| John Mack | Head | — | 35 | ~1885 |
| John Mack | Son | — | 7 | ~1913 |
| Lena Mack | Spouse | — | 34 | ~1886 |
| Harry Mack | Son | — | ~1920 | |
| Alice Mack | Daughter | — | 9 | ~1911 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 5
Allegheny, Pennsylvania · implied b. ~1915 — 8 household members
| Surname | Mack |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 15
Allegheny, Pennsylvania · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mach |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| 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
Head, age 25
Allegheny-County, Pennsylvania · implied b. ~1915 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mach |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | West Homestead |
| 1935 Residence (County) | Allegheny |
| Occupation | Machinist Helper |
| Industry | Steel Mill |
| Class of Worker | PW |
| Hours Worked | 43 |
| Income (1939) | 1100 |
| Highest Grade | Hs 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 Mack across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Mack (~0.92 confidence) and father Michael Mach (~0.92 confidence) and mother Lena Mack (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Mack
b. ~1885
Source father
● Household
· direct · ~0.92
Father
Michael Mach
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Lena Mack
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Mack
Son · 1920 · age 5 · b. ~1915 · Pennsylvania
★ You are viewing this record
Sibling
Robert Mack
Sibling · 1920 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mack
Sibling · 1920 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Mack
Sibling · 1920 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mack
Sibling · 1920 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harry Mack
Sibling · 1920 · age
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
1920 US Federal Census — Allegheny, Pennsylvania
Open full size
1920 US Federal Census — Allegheny, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1515unit:0327)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Alfred Sammonstrom | 25 | Son | Catcher | Pennsylvania |
| 52 | Edwin Sammonstrom | 19 | Son | Laborer | Pennsylvania |
| 53 | Albert Sammonstrom | 16 | Son | Catcher | Pennsylvania |
| 54 | Marie Sammonstrom | 67 | Sister | — | Sweden |
| 55 | Werner Tavert | 48 | Head | Laborer | Sweden |
| 56 | Amanda Tavert | 48 | Wife | — | Sweden |
| 57 | Roy Tavert | 23 | Son | Laborer | Pennsylvania |
| 58 | John Johnson | 41 | Head | Laborer | Sweden |
| 59 | Abigail Johnson | 11 | Daughter | — | Pennsylvania |
| 60 | Palmar Johnson | 9 | Daughter | — | Pennsylvania |
| 61 | George Mcnary | 44 | Head | Laborer | Scotland |
| 62 | Annie Mcnary | 30 | Wife | — | Ireland |
| 63 | Steve Covich | 46 | Head | Mill Worker | Austria |
| 64 | Mary Covich | 43 | Wife | — | Austria |
| 65 | Annie Covich | 21 | Daughter | — | Pennsylvania |
| 66 | Andrew Lindquist | 33 | Head | Laborer | Sweden |
| 67 | Annie Lindquist | 36 | Wife | — | Sweden |
| 68 | Lila Lindquist | 1 | Daughter | — | Pennsylvania |
| 69 | Carl Lindquist | 0 | Son | — | Pennsylvania |
| 70 | George Cunningham | 42 | Head | Trainmaster | Pennsylvania |
| 71 | Augusta Cunningham | 43 | Wife | — | Pennsylvania |
| 72 | Alex Ecklund | 68 | Head | Carpenter | Germany |
| 73 | Anna Ecklund | 67 | Wife | — | Germany |
| 74 | Harry Ecklund | 32 | Son | Carpenter | Pennsylvania |
| 75 | Joseph Stutes | 36 | Head | Heater | Pennsylvania |
| 76 | Linda Stutes | 36 | Wife | — | Pennsylvania |
| 77 | Margaret Stutes | 11 | Daughter | — | Pennsylvania |
| 78 | Robert Stutes | 10 | Son | — | Pennsylvania |
| 79 | Laurine Stutes | 8 | Daughter | — | Pennsylvania |
| 80 | Shirley Stutes | 3 | Daughter | — | Pennsylvania |
| 81 | John Mack | 35 | Head | Machinist | Scotland |
| 82 | Lena Mack | 34 | Wife | — | Pennsylvania |
| 83 | Alice Mack | 9 | Daughter | — | Pennsylvania |
| 84 | John Mack | 7 | Son | — | Pennsylvania |
| 85 | James Mack THIS PERSON | 5 | Son | — | Pennsylvania |
| 86 | Margaret Mack | 3 | Daughter | — | Pennsylvania |
| 87 | Robert Mack | 1 | Son | — | Pennsylvania |
| 88 | Harry Mack | 0 | Son | — | Pennsylvania |
| 89 | John Preston | 55 | Head | Mill Worker | Sweden |
| 90 | Emma Preston | 47 | Wife | — | Sweden |
| 91 | Herbert Preston | 25 | Son | Salesman | Pennsylvania |
| 92 | Ida Preston | 21 | Daughter | Clerk | Pennsylvania |
| 93 | Fred Preston | 18 | Son | Clerk | Pennsylvania |
| 94 | Ethel Preston | 14 | Daughter | Stenographer | Pennsylvania |
| 95 | Frank Preston | 12 | Son | — | Pennsylvania |
| 96 | Walter Preston | 10 | Son | — | Pennsylvania |
| 97 | Lucille Preston | 8 | Daughter | — | Pennsylvania |
| 98 | Robert Preston | 6 | Son | — | Pennsylvania |
| 99 | Carl Godfrey | 35 | Head | Printer | Ohio |
| 100 | Grace Godfrey | 34 | Wife | — | Pennsylvania |
Pedigree Summary
James + 5 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)