DE SOTO Meaning of DE SOTO in English de So ‧ to, Her ‧ nan ‧ do /də ˈsəʊtəʊ, həˈnændəʊ $ hərˈnɑːn-/ BrE AmE (?1500–42) a Spanish ↑ explorer who discovered the Mississippi River Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012