WM
William May — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this William May across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents Teresa & Laurence — first a son (b.~1919), then head of a 8-person household.
Age 21
b. ~1919
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | May |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Parts Clerk |
| Industry | Refrigeration |
| Class of Worker | PW |
| 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 | Parts Clerk |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1919 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Beverly May | Daughter | — | 9 | ~1931 |
| Laurence May | Head | — | 43 | ~1897 |
| Emma Heydon | Other | — | 66 | ~1874 |
| Thomas May | Son | — | 10 | ~1930 |
| William May | Son | — | 21 | ~1919 |
| Robert May | Son | — | 17 | ~1923 |
| James May | Son | — | 15 | ~1925 |
| Teresa May | Spouse | — | 42 | ~1898 |
Census Appearances
1920
Marion, Indiana
Son, age 1
Marion, Indiana · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | May |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Michigan |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Son, age 11
Marion, Indiana · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | May |
| Given Name | William J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Michigan |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Son, age 21
Marion-County, Indiana · implied b. ~1919 — 8 household members
| Surname | May |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Occupation | Parts Clerk |
| Industry | Refrigeration |
| Class of Worker | PW |
| 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 William May across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Teresa May (~0.92 confidence) and father Laurence May (~0.92 confidence) and father Lawrence May (~0.92 confidence) and mother Teresa May (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Teresa May
b. ~1896
Source mother
● Household
· direct · ~0.92
Father
Laurence May
b. ~1897
Source father
● Household
· direct · ~0.92
Father
Lawrence May
b. ~1897
Source father
● Household
· direct · ~0.92
Mother
Teresa May
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William May
Son · 1940 · age 21 · b. ~1919 · Indiana
★ You are viewing this record
Sibling
Beverly May
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert May
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas May
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James May
Sibling · 1940 · age 15
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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01130-00960)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mabel Kavanaugh | 16 | Daughter | — | Indiana |
| 42 | James E. Lee | 66 | Lodger | — | Indiana |
| 43 | Alexander Barron | 40 | Head | Manager | Russia |
| 44 | Mae Barron | 38 | Wife | — | Illinois |
| 45 | Robert A. Barron | 15 | Son | — | Indiana |
| 46 | Elaine Barron | 10 | Daughter | — | Indiana |
| 47 | Elmer Koch | 47 | Head | Buyer | Indiana |
| 48 | Rachel Koch | 40 | Wife | — | Illinois |
| 49 | Thomas Koch | 14 | Son | — | Illinois |
| 50 | Laurence J. May | 43 | Head | Service Man | Illinois |
| 51 | Teresa A. May | 42 | Wife | — | Michigan |
| 52 | William May THIS PERSON | 21 | Son | Parts Clerk | Indiana |
| 53 | Robert May | 17 | Son | — | Indiana |
| 54 | James May | 15 | Son | — | Indiana |
| 55 | Thomas May | 10 | Son | — | Indiana |
| 56 | Beverly May | 9 | Daughter | — | Indiana |
| 57 | Emma Heydon | 66 | Aunt | — | Michigan |
| 58 | Robert E. Wilson | 50 | Head | Accountant | Indiana |
| 59 | Mildred H. Wilson | 41 | Wife | — | Illinois |
| 60 | Richard J. Wilson | 15 | Son | — | Indiana |
| 61 | Sarah A. Herman | 69 | Mother-in-law | — | Illinois |
| 62 | Arthur C. Shea | 39 | Head | Sales Manager | Indiana |
| 63 | Sara Lee A. Shea | 31 | Wife | — | Indiana |
| 64 | Martha Shea | 5 | Daughter | — | Indiana |
| 65 | Sara Lee Shea | 4 | Daughter | — | Indiana |
| 66 | Arthur C. Shea | 1 | Son | — | Indiana |
| 67 | Mary Nordhoff | 17 | Nurse | Child Nurse | Indiana |
| 68 | William L. Snodgrass | 50 | Head | District Supervisor | Indiana |
| 69 | Mary H. Snodgrass | 52 | Wife | — | Pennsylvania |
| 70 | Thelma J. Snodgrass | 20 | Son | — | Indiana |
| 71 | John L. Barr | 66 | Head | Proprietor | Ireland (Eire) |
| 72 | Ann Barr | 49 | Wife | — | Ireland (Eire) |
| 73 | Mary C. Barr | 30 | Daughter | School Nurse | Indiana |
| 74 | Josephine M. Barr | 23 | Daughter | Stenographer | Indiana |
| 75 | Michael Barr | 20 | Son | — | Indiana |
| 76 | Agnes Barr | 18 | Daughter | — | Indiana |
| 77 | Rita M. Barr | 13 | Daughter | — | Indiana |
| 78 | Rose E. Barr | 7 | Daughter | — | Indiana |
| 79 | Julia A. Britz | 27 | Head | Saleslady | Indiana |
| 80 | John J. Britz | 26 | Brother | Salesman | Indiana |
Pedigree Summary
William + 4 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)