WC
William Callahan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Talbot-County, Maryland
Our Model Tree links this William Callahan across the 1930 and 1940 US Censuses in Talbot-County, Maryland (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 11-person household.
Age 47
b. ~1893
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Talbot-County, Maryland |
| Surname | Callahan |
| Given Name | William O. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District #1 Chapel District |
| 1935 Residence (County) | Talbot |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | E |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same House |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Farmer |
| Township / Ward | Election District 1 Chapel District |
| Est. Birth Year | ~1893 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Hiram Callahan | Son | — | 6 | ~1934 |
| Robert Callahan | Son | — | 7 | ~1933 |
| Dora Callahan | Son | — | 12 | ~1928 |
| William Callahan | Head | — | 47 | ~1893 |
| Margaret Callahan | Spouse | — | 46 | ~1894 |
| James Harris | Other | — | 30 | ~1910 |
| Virginia Callahan | Daughter | — | 9 | ~1931 |
| Elmer Williams | Other | — | 21 | ~1919 |
| Josephine Callahan | Daughter | — | 14 | ~1926 |
| Mary Callahan | Daughter | — | 4 | ~1936 |
| Margarette Callahan | Daughter | — | 17 | ~1923 |
Census Appearances
1930
Talbot, Maryland
Head, age 37
Talbot, Maryland · implied b. ~1893 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | William A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 22 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Farmer |
| Industry | Grain Farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Talbot-County, Maryland
Head, age 47
Talbot-County, Maryland · implied b. ~1893 — 11 household members
| Surname | Callahan |
| Given Name | William O. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District #1 Chapel District |
| 1935 Residence (County) | Talbot |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | E |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same House |
| 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 William Callahan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Callahan
Head · 1940 · age 47 · b. ~1893 · Maryland
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Talbot-County, Maryland
Open full size
1940 US Federal Census — Talbot-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01560-01071)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Charles Jr. Rathell | 19 | Son | Farm Laborer | Maryland |
| 42 | Katherine Rathell | 15 | Daughter | — | Maryland |
| 43 | Lee Rathell | 13 | Son | — | Maryland |
| 44 | Charlotte Rathell | 9 | Daughter | — | Maryland |
| 45 | William Peals | 44 | Laborer | Farm Laborer | Maryland |
| 46 | James Elms | 35 | Laborer | Farm Laborer | Maryland |
| 47 | Ben Johnson | 25 | Laborer | Farm Laborer | Virginia |
| 48 | David Lee | 52 | Laborer | Farm Laborer | Virginia |
| 49 | Beulah Gross | 19 | Cook | Servant | Maryland |
| 50 | William O. Callahan THIS PERSON | 47 | Head | Farmer | Maryland |
| 51 | Margaret H. Callahan | 46 | Wife | — | Maryland |
| 52 | Margarette Callahan | 17 | Daughter | — | Maryland |
| 53 | Dora Callahan | 12 | Son | — | Maryland |
| 54 | Josephine Callahan | 14 | Daughter | — | Maryland |
| 55 | Virginia Callahan | 9 | Daughter | — | Maryland |
| 56 | Robert Callahan | 7 | Son | — | Maryland |
| 57 | Hiram Callahan | 6 | Son | — | Maryland |
| 58 | Mary Callahan | 4 | Daughter | — | Maryland |
| 59 | James Harris | 30 | Laborer | Farm Laborer | Maryland |
| 60 | Elmer Williams | 21 | Laborer | Farm Laborer | Maryland |
| 61 | Carroll Callahan | 38 | Head | Farmer | Maryland |
| 62 | Ruth Callahan | 34 | Wife | — | Maryland |
| 63 | Elizabeth Callahan | 15 | Daughter | — | Maryland |
| 64 | Doris Callahan | 14 | Daughter | — | Maryland |
| 65 | Charles Callahan | 12 | Son | — | Maryland |
| 66 | Adelaide Callahan | 11 | Daughter | — | Maryland |
| 67 | Lee Callahan | 7 | Son | — | Maryland |
| 68 | James Harris | 37 | Head | Farm Laborer | Maryland |
| 69 | Mary Harris | 34 | Wife | — | Maryland |
| 70 | Edward Harris | 16 | Son | Farm Laborer | Maryland |
| 71 | Katherine Harris | 13 | Daughter | — | Maryland |
| 72 | Charles Kinamore | 70 | Uncle | — | Maryland |
| 73 | Parker Callahan | 40 | Head | Farmer | Maryland |
| 74 | Blanche Callahan | 36 | Wife | — | Maryland |
| 75 | Terry Callahan | 14 | Son | — | Maryland |
| 76 | Robert Callahan | 13 | Son | — | Maryland |
| 77 | Annie Callahan | 10 | Daughter | — | Maryland |
| 78 | Parker Callahan | 7 | Son | — | Maryland |
| 79 | Marion Stewart | 25 | Head | Farm Laborer | Maryland |
| 80 | Lee Powers | 29 | Head | Farm Laborer | Maryland |
Related Census Records
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)