MC
Mary Cowan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allen-County, Indiana
Our Model Tree links this Mary Cowan across the 1930 and 1940 US Censuses in Allen-County, Indiana (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 7-person household.
Age 18
b. ~1922
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allen-County, Indiana |
| Surname | Cowan |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Ft. Wayne City |
| 1935 Residence (County) | Allen |
| Additional Details | |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Ft Wayne City |
| Est. Birth Year | ~1922 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Bert Lord | Other | — | 73 | ~1867 |
| Betty Cowan | Daughter | — | 16 | ~1924 |
| Bessie Cowan | Spouse | — | 53 | ~1887 |
| Mary Cowan | Daughter | — | 18 | ~1922 |
| Donald Cowan | Son | — | 13 | ~1927 |
| Russell Cowan | Head | — | 42 | ~1898 |
| Wilbur Cowan | Son | — | 12 | ~1928 |
Census Appearances
1930
Allen, Indiana
Daughter, age 8
Allen, Indiana · implied b. ~1922 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cowan |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Allen-County, Indiana
Daughter, age 18
Allen-County, Indiana · implied b. ~1922 — 7 household members
| Surname | Cowan |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Ft. Wayne City |
| 1935 Residence (County) | Allen |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| 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 Cowan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cowan
Daughter · 1940 · age 18 · b. ~1922 · Indiana
★ You are viewing this record
Sibling
Betty Cowan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Cowan
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wilbur Cowan
Sibling · 1940 · age 12
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 — Allen-County, Indiana
Open full size
1940 US Federal Census — Allen-County, Indiana
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01118-00468)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert A Voucher | 21 | Son | — | Indiana |
| 2 | Neil H Pritchard | 31 | Head | Supervisor | Indiana |
| 3 | Katheryn E Pritchard | 29 | Wife | — | Indiana |
| 4 | Carol A Pritchard | 2 | Daughter | — | Indiana |
| 5 | Raymond Williams | 40 | Head | Bench Work | Indiana |
| 6 | Adele L Williams | 35 | Wife | — | Indiana |
| 7 | Edwin M Ames | 28 | Head | Salesman | Massachusetts |
| 8 | Irma M Ames | 26 | Wife | — | Massachusetts |
| 10 | Frank A Fremion | 39 | Head | Lens Operator | Indiana |
| 11 | Hazel H Fremion | 37 | Wife | — | Indiana |
| 12 | William F Fremion | 19 | Son | — | Indiana |
| 13 | Betty K Fremion | 16 | Daughter | — | Indiana |
| 14 | Robert A Freiburger | 29 | Head | Salesman | Indiana |
| 15 | Marcella J Freiburger | 28 | Wife | — | Indiana |
| 16 | Thomas E Freiburger | 3 | Son | — | Indiana |
| 17 | David J Freiburger | 1 | Son | — | Indiana |
| 18 | Janice J Freiburger | 0 | Daughter | — | Indiana |
| 19 | Merrill W Byrne | 38 | Head | Com. Engr | Michigan |
| 20 | Vivian M Byrne | 33 | Wife | — | Michigan |
| 21 | Joan E Byrne | 2 | Daughter | — | Indiana |
| 22 | Halbert J Nicholas | 36 | Head | Order Clerk | Indiana |
| 23 | Zola B Nicholas | 40 | Wife | — | Indiana |
| 24 | Carol A Nicholas | 3 | Daughter | — | Indiana |
| 25 | Russell L Cowan | 42 | Head | Supervisor | Indiana |
| 26 | Bessie V Cowan | 53 | Wife | — | Indiana |
| 27 | Mary E Cowan THIS PERSON | 18 | Daughter | — | Indiana |
| 28 | Betty J Cowan | 16 | Daughter | — | Indiana |
| 29 | Donald J Cowan | 13 | Son | — | Indiana |
| 30 | Wilbur E Cowan | 12 | Son | — | Indiana |
| 31 | Bert Lord | 73 | Father-in-law | — | Indiana |
| 32 | John R Jones | 49 | Head | Teacher | Indiana |
| 33 | Ethel A Jones | 32 | Wife | — | Indiana |
| 34 | Roberta J Jones | 17 | Daughter | — | Indiana |
| 35 | Duane J Jones | 16 | Son | — | Indiana |
| 36 | Gerry L Jones | 13 | Son | — | Indiana |
| 38 | Waldo D Martin | 30 | Head | Mach. Operator | Indiana |
| 39 | Opal L Martin | 29 | Wife | — | Indiana |
| 40 | Waldo D Martin | 6 | Son | — | Indiana |
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)