Shannon

Shannon is an Anglicization of the Irish name Sionann, derived from the Old Irish word for the River Shannon, Ireland's longest river. The river's name is thought to stem from a Proto-Celtic root meaning old or ancient, possibly connected to a goddess figure named Sionann in Irish mythology. The name gained widespread use as a given name in the twentieth century, particularly in English-speaking countries, and became especially popular in the United States and Ireland for both males and females, though it is now predominantly feminine. Related forms include Shanon and Shannyn.