MC
Mary Coughlin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jay-County, Indiana
Our Model Tree links this Mary Coughlin across the 1920, 1930 and 1940 US Censuses in Jay-County, Indiana (XGBoost, ~Confirmed), with identified parents James & James — first a daughter (b.~1915), then head of a 5-person household.
Age 25
b. ~1915
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jay-County, Indiana |
| Surname | Coughlin |
| Given Name | Mary Belle |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Dunkirk City |
| 1935 Residence (County) | Jay |
| Additional Details | |
| Occupation | Office Girl |
| Industry | Med. Doct. |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 700 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Office Girl |
| Township / Ward | Dunkirk City |
| Est. Birth Year | ~1915 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Coughlin | Daughter | — | 25 | ~1915 |
| James Coughlin | Head | — | 62 | ~1878 |
| Ernest Coughlin | Son | — | 21 | ~1919 |
| Laura Coughlin | Spouse | — | 57 | ~1883 |
| Fred Coughlin | Son | — | 23 | ~1917 |
Census Appearances
1920
Jay, Indiana
Daughter, age 5
Jay, Indiana · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coughlin |
| Given Name | Mary Bell |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | New York |
| Mother's Birthplace | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Jay, Indiana
Daughter, age 15
Jay, Indiana · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coughlin |
| Given Name | Mary Belle |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | New York |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Jay-County, Indiana
Daughter, age 25
Jay-County, Indiana · implied b. ~1915 — 5 household members
| Surname | Coughlin |
| Given Name | Mary Belle |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Dunkirk City |
| 1935 Residence (County) | Jay |
| Occupation | Office Girl |
| Industry | Med. Doct. |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 700 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Mary Coughlin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Coughlin (~0.92 confidence) and father James Coughlin (~0.92 confidence) and mother Laura Coughlin (~0.92 confidence) and mother Verna Coughlin (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Coughlin
b. ~1878
Source father
● Household
· direct · ~0.92
Father
James Coughlin
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Laura Coughlin
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Verna Coughlin
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Coughlin
Daughter · 1940 · age 25 · b. ~1915 · Indiana
★ You are viewing this record
Sibling
Ernest Coughlin
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fred Coughlin
Sibling · 1940 · age 23
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 — Jay-County, Indiana
Open full size
1940 US Federal Census — Jay-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01057-00773)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ross Waggaman | 36 | Head | Mechanic | Indiana |
| 2 | Chloe Waggaman | 35 | Wife | Box Maker | Indiana |
| 3 | Robert Waggaman | 12 | Son | — | Indiana |
| 4 | Leon Waggaman | 11 | Son | — | Indiana |
| 5 | Arthur Mazingo | 48 | Lodger | Finisher | Indiana |
| 6 | George E. Blackley | 82 | Head | — | Indiana |
| 7 | Elizabeth Blackley | 69 | Wife | — | Indiana |
| 8 | Charles B. Rees | 55 | Head | — | Indiana |
| 9 | Inis Rees | 54 | Wife | Lic. Clerk | Ohio |
| 10 | Betty Rees | 21 | Daughter | Ins. Agt. | Indiana |
| 11 | Frank B. Vance | 30 | Head | — | Illinois |
| 12 | Loretta Vance | 34 | Wife | — | Missouri |
| 13 | Ronald Vance | 7 | Son | — | Illinois |
| 14 | Jerry Vance | 1 | Son | — | Indiana |
| 15 | Frank B. Johnson | 38 | Head | Foreman | Indiana |
| 16 | Jessie B. Johnson | 37 | Wife | Floor Lady | Indiana |
| 17 | Donald W. Johnson | 9 | Son | — | Indiana |
| 18 | Patricia Joan Johnson | 5 | Daughter | — | Indiana |
| 19 | Calista A. Butch | 23 | Niece | — | Indiana |
| 20 | Charles A.B. Butch | 21 | Nephew | — | Indiana |
| 21 | Augustus Cline | 65 | Head | — | Ohio |
| 22 | Cora J. Cline | 59 | Wife | — | Indiana |
| 23 | Robert J. Kenyon | 24 | Head | Sorter | Indiana |
| 24 | Grace Kenyon | 30 | Wife | — | Indiana |
| 25 | James Coughlin | 62 | Head | Gateman | Penna. |
| 26 | Laura Coughlin | 57 | Wife | — | Indiana |
| 27 | Fred Coughlin | 23 | Son | Asst. Mngr. | Indiana |
| 28 | Mary Belle Coughlin THIS PERSON | 25 | Daughter | Office Girl | Indiana |
| 29 | Ernest Coughlin | 21 | Son | Mold Maker | Indiana |
| 30 | Rebecca Dunn | 75 | Head | — | Indiana |
| 31 | Samuel C. White | 41 | Head | Gatherer | Kentucky |
| 32 | Minnie B. White | 40 | Wife | — | Indiana |
| 33 | Violet White | 13 | Daughter | — | Indiana |
| 34 | J. Neil White | 10 | Son | — | Indiana |
| 35 | Fred J. Stover | 62 | Head | Tax Assessor | Indiana |
| 36 | Molly B. Stover | 63 | Wife | — | Indiana |
| 37 | Eva Wright | 76 | Head | — | Indiana |
| 38 | Melvin Simmons | 69 | Brother | — | Indiana |
| 39 | Frank Nibarger | 29 | Head | Mach. Oper. | Indiana |
| 40 | Mabel Nibarger | 26 | Wife | Box Maker | Indiana |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 4 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)