Allen is getrouwd met Jean Haverhals op 1 nov 1950 (religious) in Bethel Christian Reformed Church, Sioux Center, Iowa. Jean (dochter van Pieter Johannes Haverhals en Gertie Kooi) is geboren op 5 aug 1929 in Sioux Center, Sioux County, Iowa, USA; is gestorven op 30 jan 2016 in Hastings, Adams County, Nebraska, USA; is begraven in Parkview Cemetery, Hastings, Adams County, Nebraska, USA. [Gezinsblad] [Familiekaart]