Chart 1     [† means all children believed found, ‡ means death is computed at 112 years]

Janssen, Carl John (b:1882)(d:1968)
 . . . . .Janssen, Edna Marie (b:1915)(d:1999)[with: Heldt, Louise W (Lucy)]†
 . . . . . . . . . .<<No Children>>[with: Gilbert, Glen Dewey]
 . . . . .Janssen, Carl Ferdinand (b:1916)(d:1965)[with: Heldt, Louise W (Lucy)]
 . . . . . . . . . .Janssen, Louise Rachel (b:1946)(d:1946)[with: Sweitzer, Jessie Irene]†
 . . . . . . . . . .Janssen, David Carl (b:1949)(alive: 2024)[with: Sweitzer, Jessie Irene]
 . . . . . . . . . . . . . . .Janssen, Johan Sigfrid (b:1980)(alive: 2025)[with: Moberg, Lynette Marie]
 . . . . . . . . . . . . . . . . . . . .Janssen, Malcolm Bowie (b:2016)(alive: 2016)[with: Pekarske, Nora Jean]†
 . . . . . . . . . . . . . . . . . . . .Janssen, Felix Mercury (b:2021)(alive: 2021)[with: Pekarske, Nora Jean]
 . . . . . . . . . . . . . . .Janssen, Carl David (b:1983)(alive: 2025)[with: Moberg, Lynette Marie]
 . . . . .Janssen, Edward Walter (b:1919)(d:1979)[with: Heldt, Louise W (Lucy)]†
 . . . . . . . . . .<<No Children>>[with: Shoemaker, Lucille May]