Father:
- Jakob Johann Kastler (*1875 - †1925)
Mother:
- Bertha Amweg (*1878 - †1948)
Sibling:
- Bertha Kastler (*1899 - †1992)
Wife:
- Ernestine Rupp (*? - †?)
Children:
- John William Kastler (*? - †2000)
- Robert John Kastler (*? - †?)
- Elizabeth Ann Kastler (*? - †?)
Branch:
Notes:
a) 1930 U.S. Census: John and "Irma" living in New Milford, Bergen, New Jersey. Estimated birth year for both is 1901. Assuming Irma = Ernestine.
b) GEDCOM file: Swabian Kastlers.ged