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

Martens, John F (b:1895)(d:1980)
. . . . .Martens, Donald (b:1923)(d:)[with: Henchen, Frieda]
. . . . .Martens, Charlotte (b:1924)(d:)[with: Henchen, Frieda]
. . . . .Martens, Isabel (b:1926)(d:)[with: Henchen, Frieda]