Meaning A boy's name of Native American origin, it means "Cottonwood (Navajo)." Origin of T’iis Native American Popular Middle Names Pronunciation 🔊 Listen T’iis Similar Names Tsiishch’ili Sani Shilah Aditsan Ahiga Ashkii Dighin Atsidi Bilagaana Sik’is Sike Year by Year Popularity of T’iis