RC
Robert Cunningham — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Robert Cunningham across the 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 11-person household.
Age 13
b. ~1927
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Cunningham |
| Given Name | Robert, W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1927 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Darlene Cunningham | Daughter | — | 11 | ~1929 |
| Clarence Cunningham | Head | — | 42 | ~1898 |
| Lela Doty | Other | — | 67 | ~1873 |
| Lyle Cunningham | Son | — | 1 | ~1939 |
| Clarence Cunningham | Son | — | 7 | ~1933 |
| Paul Cunningham | Son | — | 16 | ~1924 |
| Clifford Cunningham | Son | — | 15 | ~1925 |
| Russell Cunningham | Son | — | 9 | ~1931 |
| Ronald Cunningham | Son | — | 18 | ~1922 |
| Robert Cunningham | Son | — | 13 | ~1927 |
| Mabel Cunningham | Spouse | — | 37 | ~1903 |
Census Appearances
1930
Polk, Iowa
Son, age 3
Polk, Iowa · implied b. ~1927 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cunningham |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Son, age 13
Polk-County, Iowa · implied b. ~1927 — 11 household members
| Surname | Cunningham |
| Given Name | Robert, W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Highest Grade | No 7 |
| 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 Robert Cunningham across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Cunningham
Son · 1940 · age 13 · b. ~1927 · Iowa
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Sibling
Lyle Cunningham
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Darlene Cunningham
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Cunningham
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clarence Cunningham
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ronald Cunningham
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Russell Cunningham
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clifford Cunningham
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 — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01197-00373)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Arlen, D Powers | 7 | Son | — | Iowa |
| 42 | Eugene, K Powers | 6 | Son | — | Iowa |
| 43 | Fred, O Powers | 5 | Son | — | Iowa |
| 44 | Yvonne, J Powers | 3 | Daughter | — | Iowa |
| 45 | John, O Coulter | 52 | Head | Laborer | Iowa |
| 46 | Letha, V Coulter | 38 | Wife | — | Iowa |
| 47 | Beverly, J Coulter | 10 | Daughter | — | Iowa |
| 48 | John, L Coulter | 8 | Son | — | Iowa |
| 49 | Bonnie, Jean Coulter | 1 | Daughter | — | Iowa |
| 50 | Lewis, N Sylvester | 18 | Step Son | Laborer | Iowa |
| 51 | Delmar, L Sylvester | 16 | Step Son | — | Iowa |
| 52 | Stella, F Sylvester | 15 | Daughter in law | — | Iowa |
| 53 | Theodore, W Hunt | 45 | Brother in law | Fireman | Iowa |
| 55 | Jake, F Wiley | 49 | Head | Turbine Operator | Iowa |
| 56 | Gene, F Wiley | 19 | Son | Laborer | Iowa |
| 57 | Betty June Wiley | 15 | Daughter | — | Iowa |
| 58 | Sarah, E Wise | 78 | Mother in law | — | Iowa |
| 59 | Charles, W Robinson | 55 | Head | Operator | Iowa |
| 60 | Vera Mae Robinson | 44 | Wife | — | Indiana |
| 61 | Clarence, W Cunningham | 42 | Head | Timekeeper | Iowa |
| 62 | Mabel, E Cunningham | 37 | Wife | — | Iowa |
| 63 | Ronald, W Cunningham | 18 | Son | Salesman | Iowa |
| 64 | Paul, L Cunningham | 16 | Son | — | Iowa |
| 65 | Clifford, D Cunningham | 15 | Son | — | Iowa |
| 66 | Robert, W Cunningham THIS PERSON | 13 | Son | — | Iowa |
| 67 | Darlene, M Cunningham | 11 | Daughter | — | Iowa |
| 68 | Russell, E Cunningham | 9 | Son | — | Iowa |
| 69 | Clarence, D Cunningham | 7 | Son | — | Iowa |
| 70 | Lyle, J Cunningham | 1 | Son | — | Iowa |
| 71 | Lela, O Doty | 67 | Mother in law | — | Illinois |
| 72 | David, W Sullivan | 33 | Head | Journeyman Plumber | Illinois |
| 73 | Marjorie, L Sullivan | 25 | Wife | — | Missouri |
| 74 | Raymond, L Sullivan | 7 | Son | — | Iowa |
| 75 | Beverly, H Sullivan | 6 | Daughter | — | Iowa |
| 76 | Donald, D Sullivan | 2 | Son | — | Iowa |
| 77 | Matilda Shaw | 45 | Head | — | England |
| 78 | Clarence, R Frey | 50 | Head | Carpenter | Iowa |
| 79 | Alma, G Tavener | 47 | Housekeeper | Housekeeper | Iowa |
| 80 | Mary Lou Tavener | 9 | Daughter | — | Illinois |
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)