Save Gender Masculine Usage Minahasan Pronounced Pron. /ˈri.dəl/ [key·simplify] Other Forms FormsRidel Meaning & History Transferred use of the surname Riedel as a given name. In Minahasa, this name is used in honor of Johann Friedrich Riedel (1798–1860), a German missionary who brought Christianity to the local people, alongside with Johann Gottlieb Schwarz.