United States Holocaust Memorial Museum Collection, Gift of Justin Dingfelder United States Holocaust Memorial Museum collection, gift of Justin Dingfelder United States Holocaust Memorial Museum Collection, Gift of Justin Dingfelder The Dingfelder family papers were donated to the United States Holocaust Memorial Museum by Justin Dingfelder in 1993 with two accretions in 2015. Justin Dingfelder is the son of Sigbert and Elizabeth Dingfelder.