JM
James May — 1940 US Census Record
Model Tree available1940 United States Federal Census · Lucas-County, Iowa
Our Model Tree links this James May across the 1920, 1930 and 1940 US Censuses in Lucas-County, Iowa (XGBoost, ~Confirmed), with identified parents Ellis & Elizabeth — first a head (b.~1917), then head of a 3-person household.
Age 23
b. ~1917
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lucas-County, Iowa |
| Surname | May |
| Given Name | James W |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Liberty Twp |
| 1935 Residence (County) | Lucas |
| Additional Details | |
| Occupation | Farming |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farming |
| Township / Ward | Liberty Twp |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James May | Head | — | 23 | ~1917 |
| Jerry May | Son | — | 1 | ~1939 |
| E May | Spouse | — | 24 | ~1916 |
Census Appearances
1920
Lucas, Iowa
Son, age 4
Lucas, Iowa · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | May |
| Given Name | James W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Nebraska |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Lucas, Iowa
Son, age 14
Lucas, Iowa · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | May |
| Given Name | James W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Nebraska |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Lucas-County, Iowa
Head, age 23
Lucas-County, Iowa · implied b. ~1917 — 3 household members
| Surname | May |
| Given Name | James W |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Liberty Twp |
| 1935 Residence (County) | Lucas |
| Occupation | Farming |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| 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 James May across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Ellis May (~0.92 confidence) and mother Elizabeth May (~0.92 confidence) and father Ellis May (~0.92 confidence) and mother Elizabeth May (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Ellis May
b. ~1864
Source father
● Household
· direct · ~0.92
Mother
Elizabeth May
b. ~1867
Source mother
● Household
· direct · ~0.92
Father
Ellis May
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Elizabeth May
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James May
Head · 1940 · age 23 · b. ~1917 · 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 — Lucas-County, Iowa
Open full size
1940 US Federal Census — Lucas-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01178-00628)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frankie A Crooks | 10 | Son | — | Iowa |
| 42 | Harold O Crooks | 8 | Son | — | Iowa |
| 43 | Mary E Crooks | 7 | Daughter | — | Iowa |
| 44 | Melvin A Manser | 40 | Head | Farming | Iowa |
| 45 | Icel Manser | 39 | Wife | Housework | Iowa |
| 46 | Doyle J Manser | 13 | Son | — | Iowa |
| 47 | Dorthis M Manser | 11 | Daughter | — | Iowa |
| 48 | Wayne Mumford | 24 | Head | Farming | Iowa |
| 49 | Lois M Mumford | 26 | Wife | Housework | Indiana |
| 50 | Ronald Lee Mumford | 2 | Son | — | Iowa |
| 51 | Sharon Marie Mumford | 1 | Daughter | — | Iowa |
| 52 | Martin Shelton | 25 | Head | Farming | Iowa |
| 53 | Evelyn E Shelton | 24 | Wife | Housework | Iowa |
| 54 | Eva Mae Shelton | 3 | Daughter | — | Iowa |
| 55 | O J Coffman | 57 | Head | Farming | Nebraska |
| 56 | Maggie Coffman | 50 | Wife | Housework | Iowa |
| 57 | Rex Coffman | 16 | Son | — | Nebraska |
| 58 | Dale Coffman | 14 | Son | — | Nebraska |
| 59 | Maxine Coffman | 13 | Daughter | — | Nebraska |
| 60 | Nel Coffman | 6 | Son | — | Nebraska |
| 61 | Florence Clingerman | 83 | Mother | — | Ohio |
| 62 | Earl C Elmerdyke | 47 | Head | Farming | Iowa |
| 63 | Eva L Elmerdyke | 49 | Wife | Housework | Kansas |
| 64 | Earline G Elmerdyke | 16 | Daughter | — | Iowa |
| 65 | Olin Shelton | 22 | Hired Hand | Farm Work | Iowa |
| 66 | Morris Sivill | 37 | Head | Farming | Iowa |
| 67 | Pal M Sivill | 29 | Wife | Housework | Iowa |
| 68 | Walter D Sivill | 7 | Son | — | Iowa |
| 69 | Merrill E Sivill | 5 | Son | — | Iowa |
| 70 | Oral A Thom | 42 | Head | Farming | Iowa |
| 71 | Emma G Thom | 39 | Wife | Housework | Iowa |
| 72 | Vanda Thom | 16 | Daughter | — | Iowa |
| 73 | Mildred B Thom | 14 | Daughter | — | Iowa |
| 74 | Mary Lou Thom | 12 | Daughter | — | Iowa |
| 75 | Frances M Sill | 16 | Granddaughter | — | Iowa |
| 76 | James W May THIS PERSON | 23 | Head | Farming | Iowa |
| 77 | E Mirl May | 24 | Wife | Housework | Iowa |
| 78 | Jerry E May | 1 | Son | — | Iowa |
| 79 | Chuck Shelton | 29 | Head | Farming | Iowa |
| 80 | Harold Parry | 42 | Head | Farming | Iowa |
Pedigree Summary
James
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)