TC
Thomas Carroll — 1940 US Census Record
Model Tree available1940 United States Federal Census · Montgomery-County, Pennsylvania
Our Model Tree links this Thomas Carroll across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Katharine & John — first a son (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Pennsylvania |
| Surname | Carroll |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Abington Tp. |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | new worker |
| Class of Worker | PW |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | New Worker |
| Township / Ward | Abington Tp |
| Est. Birth Year | ~1917 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| John Carroll | Head | — | 54 | ~1886 |
| Mary O'Brien | Other | — | 65 | ~1875 |
| Katherine Carroll | Daughter | — | 24 | ~1916 |
| John Carroll | Son | — | 19 | ~1921 |
| Thomas Carroll | Son | — | 23 | ~1917 |
Census Appearances
1920
Montgomery, Pennsylvania
Son, age 3
Montgomery, Pennsylvania · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Mother Tongue | English |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Montgomery, Pennsylvania
Son, age 13
Montgomery, Pennsylvania · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Thomas G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Montgomery-County, Pennsylvania
Son, age 23
Montgomery-County, Pennsylvania · implied b. ~1917 — 5 household members
| Surname | Carroll |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Abington Tp. |
| 1935 Residence (County) | Montgomery |
| Occupation | new worker |
| Class of Worker | PW |
| Hours Worked | 0 |
| Income (1939) | 0 |
| 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 Thomas Carroll across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Katharine Carroll (~0.92 confidence) and father John Carroll (~0.92 confidence) and father John Carroll (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Katharine Carroll
b. ~1877
Source mother
● Household
· direct · ~0.92
Father
John Carroll
b. ~1886
Source father
● Household
· direct · ~0.92
Father
John Carroll
b. ~1887
Source father
● Household
· direct · ~0.92
This person
Anchor record
Thomas Carroll
Son · 1940 · age 23 · b. ~1917 · Pennsylvania
★ You are viewing this record
Sibling
John Carroll
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katherine Carroll
Sibling · 1940 · age 24
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 — Montgomery-County, Pennsylvania
Open full size
1940 US Federal Census — Montgomery-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03576-00542)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Helen Johnson | 23 | Daughter-in-law | Stenographer | New York |
| 2 | Robert Johnson | 1 | Grandson | — | Pennsylvania |
| 3 | Anna Trout | 51 | Head | — | Austria |
| 4 | Joseph F. Trout | 14 | Son | — | Pennsylvania |
| 5 | Edith Burton | 41 | Head | — | Pennsylvania |
| 6 | Perry Burton | 17 | Son | — | Pennsylvania |
| 7 | Joyce Burton | 5 | Daughter | — | Pennsylvania |
| 8 | Edmund Bittner | 32 | Head | Highway Inspector | Pennsylvania |
| 9 | Margaret Bittner | 25 | Wife | — | W. Virginia |
| 10 | Edmund Bittner | 5 | Son | — | Pennsylvania |
| 11 | Barbara Bittner | 2 | Daughter | — | Pennsylvania |
| 12 | Morris Dugan | 33 | Head | Plumber | Pennsylvania |
| 13 | Margaret Dugan | 32 | Wife | — | Eire |
| 14 | John Dugan | 1 | Son | — | Pennsylvania |
| 15 | Bridget Dugan | 63 | Mother | — | Eire |
| 16 | Francis Dugan | 22 | Brother | Manager | Pennsylvania |
| 17 | David Jenkins | 53 | Head | Plasterer | Scotland |
| 18 | Katherine Jenkins | 56 | Wife | — | Eire |
| 19 | William Jenkins | 30 | Son | Salesman | Pennsylvania |
| 20 | Edward Jenkins | 19 | Son | New Worker | Pennsylvania |
| 21 | Katherine Jenkins | 15 | Daughter | — | Pennsylvania |
| 22 | Robert Jenkins | 8 | Son | — | Pennsylvania |
| 23 | Joseph Finney | 8 | Boarder | — | Pennsylvania |
| 24 | Salvatore Varino | 42 | Head | Truck Driver | Italy |
| 25 | Delphine Varino | 37 | Wife | — | Pennsylvania |
| 26 | Rita Varino | 11 | Daughter | — | Pennsylvania |
| 27 | Vincent Varino | 8 | Son | — | Pennsylvania |
| 28 | Franklin Varino | 5 | Son | — | Pennsylvania |
| 29 | Eleanor Varino | 3 | Daughter | — | Pennsylvania |
| 30 | John Carroll | 54 | Head | Fireman | Eire |
| 31 | Katherine Carroll | 24 | Daughter | Stenographer | Pennsylvania |
| 32 | Thomas Carroll THIS PERSON | 23 | Son | New Worker | Pennsylvania |
| 33 | John Carroll | 19 | Son | New Worker | Pennsylvania |
| 34 | Mary O'Brien | 65 | Mother-in-law | — | Eire |
| 35 | Leon Cardon | 44 | Head | Cabinet Maker | Pennsylvania |
| 36 | Germaine Cardon | 40 | Wife | — | France |
| 37 | Leon Cardon | 20 | Son | Salesman | Pennsylvania |
| 38 | Louis Cardon | 15 | Son | — | Pennsylvania |
| 39 | Marie Cardon | 11 | Daughter | — | Pennsylvania |
| 40 | Albert Hermann | 30 | Head | Mail Carrier | Pennsylvania |
Pedigree Summary
Thomas + 2 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 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)