Does Any One Know About a John Derwacter Harmon

My husband is the gt grandson of King Emanuel Harmon b 1841. He was married to Mary Ann
Selix b 1841. Her Mothers name was Pheobe Derwacter/Duerrwaechter plus other spellings.
Her father's name was Alfred Selix.
I would like information as to who named a son JOHN DERWACTER HARMON?

Thanking you in advance for your time and effort in helping me.
Maxine Davies

kansaslassie@gmail.com