JC
John Carroll — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Frederick-County, Maryland
Our Model Tree links this John Carroll across the 1920, 1930 and 1940 US Censuses in Frederick-County, Maryland (XGBoost, ~Confirmed) — first a head (b.~1883), then head of a 10-person household.
Age 57
b. ~1883
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Frederick-County, Maryland |
| Surname | Carroll |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Urbana Dist. |
| 1935 Residence (County) | Frederick |
| Additional Details | |
| Occupation | Laborer |
| Industry | Lime Plant |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 330 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Laborer |
| Township / Ward | Urbana Dist |
| Est. Birth Year | ~1883 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Thelma Carroll | Daughter | — | 7 | ~1933 |
| Eunogine Carroll | Daughter | — | 13 | ~1927 |
| John Carroll | Head | — | 57 | ~1883 |
| Winston Watkins | Other | — | ~1940 | |
| William Carr | Other | — | 2 | ~1938 |
| Florence Wallace | Other | — | 1 | ~1939 |
| David Carroll | Son | — | 11 | ~1929 |
| Norman Carroll | Son | — | 4 | ~1936 |
| Daniel Carroll | Son | — | 17 | ~1923 |
| Addie Carroll | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Frederick, Maryland
Head, age 39
Frederick, Maryland · implied b. ~1881 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | John E |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Brick Yard |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Frederick, Maryland
Head, age 48
Frederick, Maryland · implied b. ~1882 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 25 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Lime Kiln |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Frederick-County, Maryland
Head, age 57
Frederick-County, Maryland · implied b. ~1883 — 10 household members
| Surname | Carroll |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Urbana Dist. |
| 1935 Residence (County) | Frederick |
| Occupation | Laborer |
| Industry | Lime Plant |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 330 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Carroll across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Carroll
Head · 1940 · age 57 · b. ~1883 · Maryland
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Frederick-County, Maryland
Open full size
1940 US Federal Census — Frederick-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01548-00794)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John E. Carroll THIS PERSON | 57 | Head | Laborer | Maryland |
| 42 | Addie M. Carroll | 49 | Wife | Housewife | Maryland |
| 43 | Daniel J. Carroll | 17 | Son | — | Maryland |
| 44 | Eunogine Carroll | 13 | Daughter | — | Maryland |
| 45 | David E. Carroll | 11 | Son | — | Maryland |
| 46 | Thelma C. Carroll | 7 | Daughter | — | Maryland |
| 47 | Norman Carroll | 4 | Son | — | Maryland |
| 48 | William D. Carr | 2 | Boarder | — | Maryland |
| 49 | Florence E. Wallace | 1 | Boarder | — | Maryland |
| 50 | Winston L. Watkins | 0 | Boarder | — | Maryland |
| 51 | Marshall Allen | 75 | Head | — | Virginia |
| 52 | Cora D. Allen | 64 | Wife | Housewife | New Jersey |
| 53 | Clinton H. Allen | 37 | Son | Laborer | Maryland |
| 54 | Merhl A. Allen | 23 | Son | Labor | Maryland |
| 55 | Esther E. Allen | 16 | Daughter | — | Maryland |
| 56 | Ernest W. Weedon | 29 | Head | Laborer | Maryland |
| 57 | Alice T. Weedon | 29 | Wife | Housewife | Maryland |
| 58 | James F. Weedon | 9 | Son | — | Maryland |
| 59 | Edward R. Weedon | 7 | Son | — | Maryland |
| 60 | Mildred V. Weedon | 4 | Daughter | — | Maryland |
| 61 | Namen L. Weedon | 2 | Son | — | Maryland |
| 62 | Harvey W. Weedon | 0 | Son | — | Maryland |
| 63 | Robert L. Holland | 25 | Head | Laborer | Maryland |
| 64 | Annie M. Holland | 65 | Wife | Housewife | Maryland |
| 65 | Joseph D. Holland | 42 | Son | Laborer | Maryland |
| 66 | Nelson J. Holland | 30 | Son | Laborer | Maryland |
| 67 | Sterling A. Holland | 24 | Son | Laborer | Maryland |
| 68 | David E. Holland | 23 | Son | Laborer | Maryland |
| 69 | John E. Holland | 25 | Son | Laborer | Maryland |
| 70 | Mamie E. Holland | 24 | Daughter-in-law | — | Maryland |
| 71 | Catherine M. Holland | 2 | Granddaughter | — | Maryland |
| 72 | Joseph R. Lee | 48 | Head | Laborer | Maryland |
| 73 | Jennie E. Lee | 38 | Wife | Housewife | Maryland |
| 74 | Thomas G. Lee | 20 | Son | Laborer | Maryland |
| 75 | Richard J. Lee | 18 | Son | Laborer | Maryland |
| 76 | Bessie V. Lee | 16 | Daughter | — | Maryland |
| 77 | Edna M. Lee | 14 | Daughter | — | Maryland |
| 78 | Calvin R. Lee | 12 | Son | — | Maryland |
| 79 | Gilbert E. Lee | 10 | Son | — | Maryland |
| 80 | Bennie F. Lee | 9 | Son | — | Maryland |
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)