RM
Robert May — 1940 US Census Record
Model Tree available1940 United States Federal Census · Audubon-County, Iowa
Our Model Tree links this Robert May across the 1920, 1930 and 1940 US Censuses in Audubon-County, Iowa (XGBoost, ~Confirmed), with identified parents Effa & Ethel — first a head (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Audubon-County, Iowa |
| Surname | May |
| Given Name | Robert Q |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Audubon |
| Additional Details | |
| Occupation | Farmer |
| Industry | Wood Corn Co |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 352 |
| Highest Grade | 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Exira Town |
| Est. Birth Year | ~1918 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Evelyn May | Spouse | — | 22 | ~1918 |
| Charles May | Son | — | 1 | ~1939 |
| Robert May | Head | — | 22 | ~1918 |
Census Appearances
1920
Audubon, Iowa
Son, age 2
Audubon, Iowa · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | May |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Audubon, Iowa
Son, age 12
Audubon, Iowa · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | May |
| Given Name | Robert R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Audubon-County, Iowa
Head, age 22
Audubon-County, Iowa · implied b. ~1918 — 3 household members
| Surname | May |
| Given Name | Robert Q |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Audubon |
| Occupation | Farmer |
| Industry | Wood Corn Co |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 352 |
| Highest Grade | 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Robert May across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Effa May (~0.92 confidence) and mother Ethel May (~0.92 confidence) and father H May (~0.92 confidence) and father Harry May (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Effa May
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Ethel May
b. ~1877
Source mother
● Household
· direct · ~0.92
Father
H May
b. ~1879
Source father
● Household
· direct · ~0.92
Father
Harry May
b. ~1880
Source father
● Household
· direct · ~0.92
This person
Anchor record
Robert May
Head · 1940 · age 22 · b. ~1918 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Audubon-County, Iowa
Open full size
1940 US Federal Census — Audubon-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01137-00811)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eugene A Isaborg | 31 | Head | Clerk | Iowa |
| 2 | Marilyn Isaborg | 31 | Wife | — | Iowa |
| 3 | Janice Isaborg | 5 | Daughter | — | Iowa |
| 4 | Linda Isaborg | 4 | Daughter | — | Iowa |
| 5 | Henry G Smith | 45 | Head | Veterinarian | Kansas |
| 6 | Edith Q Smith | 41 | Wife | — | Missouri |
| 7 | Wayne Smith | 16 | Son | Usher | Iowa |
| 8 | George Smith | 12 | Son | — | Iowa |
| 9 | Jane Smith | 3 | Daughter | — | Iowa |
| 10 | Robert Q May THIS PERSON | 22 | Head | Farmer | Iowa |
| 11 | Evelyn May | 22 | Wife | — | Iowa |
| 12 | Charles May | 1 | Son | — | Iowa |
| 13 | Edward D Boggs | 36 | Head | Nailer | Iowa |
| 14 | Ethel Boggs | 38 | Wife | — | W. Virginia |
| 15 | Bonny R Boggs | 7 | Daughter | — | Iowa |
| 16 | Shirly M Boggs | 2 | Daughter | — | Indiana |
| 17 | Jens Jensen | 35 | Head | Truck Driver | Iowa |
| 18 | Danita Q Jensen | 30 | Wife | — | Iowa |
| 19 | Eugene Jensen | 7 | Son | — | Iowa |
| 20 | Wanda M Jensen | 5 | Daughter | — | Iowa |
| 21 | Charles Ray Jensen | 2 | Son | — | Iowa |
| 22 | Chester A Lucey | 44 | Head | Local Manager | Iowa |
| 23 | Nora Lucey | 41 | Wife | — | Iowa |
| 24 | Myra (K B) Lucey | 19 | Daughter | Assistant Teacher | Iowa |
| 25 | Chester Jr Lucey | 11 | Son | — | Iowa |
| 26 | Julia Palma | 57 | Head | Housework | Iowa |
| 27 | Lena Palma | 56 | Sister | Housework | Iowa |
| 28 | Charles A Simonsen | 61 | Head | W.P.A. Laborer | Nebraska |
| 29 | Ethel Simonsen | 58 | Wife | — | Iowa |
| 30 | Phyllis Simonsen | 19 | Daughter | Stenographer | Colorado |
| 31 | Mary B Hicks | 85 | Mother in law | — | Ohio |
| 32 | Peter A Jensen | 42 | Head | Proprietor | Iowa |
| 33 | Helena Q Jensen | 42 | Wife | — | Iowa |
| 34 | Freddie Jensen | 15 | Son | — | Iowa |
| 35 | Virginia Jensen | 13 | Daughter | — | Iowa |
| 36 | Hans Q Hansen | 65 | Head | — | Sweden |
| 37 | Mable Wallace | 32 | Roomer | Office Manager | Nebraska |
| 38 | Folmer Vickery | 24 | Roomer | Truck Driver | Iowa |
| 39 | Sam Q Simonson | 29 | Head | Mechanic | Iowa |
| 40 | Mary Simonson | 25 | Wife | — | Iowa |
Pedigree Summary
Robert
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)