JC
James Callahan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cuyahoga-County, Ohio
Our Model Tree links this James Callahan across the 1920, 1930 and 1940 US Censuses in Cuyahoga-County, Ohio (XGBoost, ~Confirmed), with identified parents James & James — first a son (b.~1917), then head of a 6-person household.
Age 23
b. ~1917
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cuyahoga-County, Ohio |
| Surname | Callahan |
| Given Name | James R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cleveland |
| 1935 Residence (County) | Cuyahoga |
| Additional Details | |
| Occupation | Accountant |
| Industry | Const. & Invest. |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1200 |
| Highest Grade | C 4 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Accountant |
| Township / Ward | Cleveland |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Callahan | Son | — | 23 | ~1917 |
| George Callahan | Son | — | 16 | ~1924 |
| Nellie Callahan | Spouse | — | 51 | ~1889 |
| Paul Callahan | Son | — | 14 | ~1926 |
| James Callahan | Head | — | 55 | ~1885 |
| Robert Callahan | Son | — | 20 | ~1920 |
Census Appearances
1920
Cuyahoga, Ohio
Son, age 3
Cuyahoga, Ohio · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | James R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Cuyahoga, Ohio
Son, age 13
Cuyahoga, Ohio · implied b. ~1917 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | James R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Cuyahoga-County, Ohio
Son, age 23
Cuyahoga-County, Ohio · implied b. ~1917 — 6 household members
| Surname | Callahan |
| Given Name | James R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cleveland |
| 1935 Residence (County) | Cuyahoga |
| Occupation | Accountant |
| Industry | Const. & Invest. |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1200 |
| Highest Grade | C 4 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Callahan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Callahan (~0.92 confidence) and father James Callahan (~0.92 confidence) and father James Callahan (~0.92 confidence) and mother Effie Callahan (~0.92 confidence) and mother Nellie Callahan (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Callahan
b. ~1885
Source father
● Household
· direct · ~0.92
Father
James Callahan
b. ~1885
Source father
● Household
· direct · ~0.92
Father
James Callahan
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Effie Callahan
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Nellie Callahan
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Callahan
Son · 1940 · age 23 · b. ~1917 · Ohio
★ You are viewing this record
Sibling
George Callahan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Callahan
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Callahan
Sibling · 1940 · age 20
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 — Cuyahoga-County, Ohio
Open full size
1940 US Federal Census — Cuyahoga-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03050-00018)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Adolph Weinberger | 49 | Head | Executive - Pres. | Czechoslovakia |
| 42 | Minnie S. Weinberger | 47 | Wife | — | Ohio |
| 43 | Ruth Weinberger | 22 | Daughter | — | Ohio |
| 44 | Elline Weinberger | 19 | Daughter | — | Ohio |
| 45 | Carl Weinberger | 15 | Son | — | Ohio |
| 46 | Jerry Weinberger | 12 | Son | — | Ohio |
| 47 | Juliana Krenjancic | 27 | Maid | Maid | Ohio |
| 48 | James J. Callahan | 55 | Head | — | Ohio |
| 49 | Nellie Callahan | 51 | Wife | — | Ohio |
| 50 | James R. Callahan THIS PERSON | 23 | Son | Accountant | Ohio |
| 51 | Robert M. Callahan | 20 | Son | Dock Man | Ohio |
| 52 | George E. Callahan | 16 | Son | — | Ohio |
| 53 | Paul V. Callahan | 14 | Son | — | Ohio |
| 54 | Hilda Gahan | 38 | Head | Owner Of Nursing Home | Ohio |
| 55 | Roy Gahan | 52 | Husband | Elevator Operator | Ohio |
| 56 | Mary Hennessy | 58 | Servant | Servant | Ohio |
| 57 | William Porter | 65 | Houseman | Houseman | Canada |
| 58 | Mary Hurst | 54 | Nurse | Nurse | Ohio |
| 59 | Olive Hennessy | 53 | Lodger | — | Ohio |
| 60 | Mary Elizabeth Gahan | 9 | Niece | — | Ohio |
| 61 | William White Gahan | 8 | Nephew | — | Ohio |
| 62 | Amelia Shunk | 90 | Patient | — | Ohio |
| 63 | Florence Owens | 64 | Patient | — | Ohio |
| 64 | Anna B. Smith | 88 | Patient | — | Ohio |
| 65 | Ella Christy | 83 | Patient | — | Ohio |
| 66 | Mary Myers | 67 | Patient | — | Russia |
| 67 | Ella Trott | 80 | Patient | — | New York |
| 68 | Mary Wright | 64 | Patient | — | Ohio |
| 69 | Bertha Coffinberry | 73 | Patient | — | Ohio |
| 70 | Prilla Branyan | 80 | Patient | — | Ohio |
| 71 | Luilla Armstrong | 67 | Patient | — | Massachusetts |
| 72 | Sallie Ferguson | 82 | Patient | — | Ohio |
| 73 | Harriet Gibbs | 81 | Patient | — | Ohio |
| 74 | Leland Cheat | 56 | Head | — | Illinois |
| 75 | Retta Cheat | 56 | Wife | Dressmaker | Kentucky |
| 76 | Carroll G. Ludlow | 50 | Head | Salesman | Ohio |
| 77 | Gertrude L. Ludlow | 49 | Wife | — | Ohio |
| 78 | Robert Ludlow | 24 | Son | Office Clerk | Ohio |
| 79 | Kurt E. Tratrop | 57 | Head | Chef | Germany |
| 80 | Edith Tratrop | 47 | Wife | Typist | Germany |
Pedigree Summary
James + 3 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)