JC
Joseph Cunningham — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Black-Hawk-County, Iowa
Our Model Tree links this Joseph Cunningham across the 1930 and 1940 US Censuses in Black-Hawk-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 7-person household.
Age 15
b. ~1925
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Black-Hawk-County, Iowa |
| Surname | Cunningham |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Barclay Twp |
| 1935 Residence (County) | Black Hawk |
| Additional Details | |
| Occupation | S |
| Industry | Student |
| Income (1939) | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | S |
| Township / Ward | Barclay Twp |
| Est. Birth Year | ~1925 |
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 Joseph | Age | Birth yr |
|---|---|---|---|---|
| Joseph Cunningham | Son | — | 15 | ~1925 |
| James Cunningham | Son | — | 18 | ~1922 |
| Rosie Cunningham | Spouse | — | 37 | ~1903 |
| Dorothy Cunningham | Daughter | — | 13 | ~1927 |
| Margaret Cunningham | Daughter | — | 2 | ~1938 |
| Catherine Cunningham | Daughter | — | 16 | ~1924 |
| Mary Cunningham | Daughter | — | 8 | ~1932 |
Census Appearances
1930
Black Hawk, …
Son, age 5
Black Hawk, Iowa · implied b. ~1925 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cunningham |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| 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
Black-Hawk-County, Iowa
Son, age 15
Black-Hawk-County, Iowa · implied b. ~1925 — 7 household members
| Surname | Cunningham |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Barclay Twp |
| 1935 Residence (County) | Black Hawk |
| Occupation | S |
| Industry | Student |
| Income (1939) | 0 |
| Highest Grade | Hs 1 |
| 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 Joseph Cunningham across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joseph Cunningham
Son · 1940 · age 15 · b. ~1925 · Iowa
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Sibling
Dorothy Cunningham
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Cunningham
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Cunningham
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Cunningham
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Cunningham
Sibling · 1940 · age 16
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 — Black-Hawk-County, Iowa
Open full size
1940 US Federal Census — Black-Hawk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01139-00022)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rosie Cunningham | 37 | Wife | H | Iowa |
| 2 | James Cunningham | 18 | Son | Farmer | Iowa |
| 3 | Catherine Cunningham | 16 | Daughter | H | Iowa |
| 4 | Joseph Cunningham THIS PERSON | 15 | Son | S | Iowa |
| 5 | Dorothy Cunningham | 13 | Daughter | — | Iowa |
| 6 | Mary Cunningham | 8 | Daughter | — | Iowa |
| 7 | Margaret Cunningham | 2 | Daughter | — | Iowa |
| 8 | Alma Nesfold | 66 | Head | Farmer | Iowa |
| 9 | Lloyd Weidman | 45 | Head | Farmer | Nebraska |
| 10 | Harold Weidman | 19 | Son | Farm Laborer | Iowa |
| 11 | Donita Weidman | 16 | Daughter | S | Iowa |
| 12 | Alice Weidman | 14 | Daughter | S | Iowa |
| 13 | John Turner | 53 | Brother | Farm Laborer | Iowa |
| 14 | Ethel Baker | 39 | Housekeeper | Housekeeper | Iowa |
| 15 | James Baker | 1 | Son | — | Iowa |
| 16 | Henry Marlowe | 62 | Head | Farmer | Germany |
| 17 | Mary Marlowe | 32 | Wife | H | New York |
| 18 | Elizabeth Marlowe | 9 | Daughter | — | Iowa |
| 19 | Casper Ortner | 45 | Head | Farmer | Iowa |
| 20 | Clara Ortner | 38 | Wife | H | Iowa |
| 21 | Leo Ortner | 19 | Son | Farm Laborer | Iowa |
| 22 | Roy Ortner | 17 | Son | S | Iowa |
| 23 | Margaret Ortner | 16 | Daughter | S | Iowa |
| 24 | Eugene Ortner | 10 | Son | — | Iowa |
| 25 | Ronald Ortner | 8 | Son | — | Iowa |
| 26 | Hugh Ortner | 7 | Son | — | Iowa |
| 27 | Max Ortner | 5 | Son | — | Iowa |
| 28 | Victor Ortner | 3 | Son | — | Iowa |
| 29 | Uri Wellner | 35 | Head | Farmer | Iowa |
| 30 | Agnes Wellner | 30 | Wife | H | Iowa |
| 31 | Catherine Wellner | 3 | Daughter | — | Iowa |
| 32 | Paul A. Muebel | 49 | Head | Farmer | Iowa |
| 33 | Elizabeth Muebel | 51 | Wife | H | Iowa |
| 34 | Paul C. Muebel | 21 | Son | Farm Laborer | Iowa |
| 35 | Helen Muebel | 19 | Daughter | H | Iowa |
| 36 | Leonard Muebel | 14 | Son | S | Iowa |
| 37 | Betty Lou Muebel | 12 | Daughter | — | Iowa |
| 38 | Robert W. Muebel | 6 | Son | — | Iowa |
| 39 | Mayme Weber | 51 | Head | Farmer | Iowa |
| 40 | Rayburn Weber | 25 | Son | Farm Laborer | Iowa |
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)