 "Tuisto" is the Latinized form of a Proto-Germanic theonym that is a matter of some debate.By way of historical linguistics some scholars have linked "Tuisto" to the Proto-Germanic theonym *"Tiwaz", while other scholars have argued that the name refers to a "two-fold" or hermaphroditic being (compare Old Swedish "tvistra", meaning "separate").The latter etymology has led scholars to a connection to Ymir on both linguistic and mythical grounds.