JM
John Mcgrath — 1940 US Census Record
Model Tree available1940 United States Federal Census · Schuylkill-County, Pennsylvania
Our Model Tree links this John Mcgrath across the 1920, 1930 and 1940 US Censuses in Schuylkill-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents James & James — first a son (b.~1909), then head of a 5-person household.
Age 31
b. ~1909
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Schuylkill-County, Pennsylvania |
| Surname | McGrath |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Tremont Borough |
| 1935 Residence (County) | Schuylkill |
| Additional Details | |
| Occupation | Laborer |
| Industry | Brewery |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 500 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Laborer |
| Township / Ward | Tremont Borough |
| Est. Birth Year | ~1909 |
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 |
|---|---|---|---|---|
| James Mcgrath | Head | — | 63 | ~1877 |
| John Mcgrath | Son | — | 31 | ~1909 |
| James Mcgrath | Son | — | 22 | ~1918 |
| Charles Mcgrath | Son | — | 15 | ~1925 |
| Anna Mcgrath | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Schuylkill, Pennsylvania
Son, age 11
Schuylkill, Pennsylvania · implied b. ~1909 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Schuylkill, Pennsylvania
Son, age 21
Schuylkill, Pennsylvania · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| 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
Schuylkill-County, Pennsylvania
Son, age 31
Schuylkill-County, Pennsylvania · implied b. ~1909 — 5 household members
| Surname | McGrath |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Tremont Borough |
| 1935 Residence (County) | Schuylkill |
| Occupation | Laborer |
| Industry | Brewery |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 500 |
| 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 Mcgrath across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Mcgrath (~0.92 confidence) and father James Mcgrath (~0.92 confidence) and mother Anna Mcgrath (~0.92 confidence) and mother Anna Mcgrath (~0.92 confidence) and mother Winifred Mcgrath (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Mcgrath
b. ~1877
Source father
● Household
· direct · ~0.92
Father
James Mcgrath
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Anna Mcgrath
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Anna Mcgrath
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Winifred Mcgrath
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mcgrath
Son · 1940 · age 31 · b. ~1909 · Pennsylvania
★ You are viewing this record
Sibling
James Mcgrath
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Mcgrath
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 — Schuylkill-County, Pennsylvania
Open full size
1940 US Federal Census — Schuylkill-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03607-00465)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Irene Koch | 29 | Wife | Sewer | Pennsylvania |
| 2 | Lois Koch | 11 | Daughter | — | Pennsylvania |
| 3 | Palmer Koch | 10 | Son | — | Pennsylvania |
| 4 | Robert S. Eckler | 52 | Head | Laborer | Pennsylvania |
| 5 | Lydiard Eckler | 47 | Wife | — | Pennsylvania |
| 6 | Russel Yoder | 32 | Son-in-law | Utilityman | Pennsylvania |
| 7 | Margaret Yoder | 25 | Daughter | Belt Maker | Pennsylvania |
| 8 | William J. Cleary | 53 | Head | Miner | Pennsylvania |
| 9 | Thomas Cleary | 24 | Son | Attendant | Pennsylvania |
| 10 | William Cleary | 19 | Son | Floor Boy | Pennsylvania |
| 11 | John Cleary | 16 | Son | — | Pennsylvania |
| 12 | Charles Shutt | 18 | Son-in-law | Laborer | Pennsylvania |
| 13 | Mary Shutt | 18 | Daughter | — | Pennsylvania |
| 14 | Charles Jr. Shutt | 0 | Grandson | — | Pennsylvania |
| 15 | James A. Mcgrath | 63 | Head | — | Pennsylvania |
| 16 | Anna Mcgrath | 60 | Wife | — | Pennsylvania |
| 17 | John Mcgrath THIS PERSON | 31 | Son | Laborer | Pennsylvania |
| 18 | James Mcgrath | 22 | Son | New Worker | Pennsylvania |
| 19 | Charles Mcgrath | 15 | Son | — | Pennsylvania |
| 20 | William C. Myerly | 35 | Head | Laborer | Pennsylvania |
| 21 | Walter Myerly | 10 | Son | — | Pennsylvania |
| 22 | F. William Myerly | 5 | Son | — | Pennsylvania |
| 23 | Betty Myerly | 2 | Daughter | — | Pennsylvania |
| 24 | Ruby (A.) Myerly | 33 | Wife | — | Pennsylvania |
| 25 | Lottie Scheit | 40 | Housekeeper | Housekeeper | Pennsylvania |
| 26 | Riley Koppenhaver | 49 | Head | Laborer | Pennsylvania |
| 27 | Bertha Koppenhaver | 46 | Wife | — | Pennsylvania |
| 28 | Kenneth Koppenhaver | 22 | Son | Presser | Pennsylvania |
| 29 | Miriam Koppenhaver | 19 | Daughter | Label Sewer | Pennsylvania |
| 30 | Elizabeth Koppenhaver | 17 | Daughter | — | Pennsylvania |
| 31 | Warren Koppenhaver | 14 | Son | — | Pennsylvania |
| 32 | Robert Koppenhaver | 11 | Son | — | Pennsylvania |
| 33 | Frank Miller | 29 | Head | Laborer | Pennsylvania |
| 34 | Veronica Miller | 23 | Wife | — | Pennsylvania |
| 35 | Frank H. Miller | 0 | Son | — | Pennsylvania |
| 36 | Alfred J. Tobias | 45 | Head | District Manager | Pennsylvania |
| 37 | Alma E. Tobias | 36 | Wife | — | Pennsylvania |
| 38 | Roger Tobias | 16 | Son | — | Pennsylvania |
| 39 | Donald Tobias | 11 | Son | — | Pennsylvania |
| 40 | Extra Line | None | — | — | — |
Related Census Records
Pedigree Summary
John + 2 siblings
Gen 1 · 5 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)