A derivative of T'iis is the name Tiffs.
T'iis is an uncommon baby name for boys. It is not in the top 1000 names.
Baby names that sound like T'iis include Thijs (Dutch), Tad (English, Irish, Latin, and Welsh), Tadd (English and Welsh), Tadeás (Czech and Slavic), Tades (Czech), Tadgh (Irish), Tadhg (Gaelic, Irish, and Scottish), Tadhgh, Tag, Taghee, Tahj (English and Indian), Taidgh, Taig, Taj (Arabic, English, and Indian), Taje, Tajee, Tajh, Taogh (Scottish), Taos, and Tas.
† approx English pronunciation for T'iis: T as in "tee (T.IY)" ; IY as in "eat (IY.T)" ; Z as in "zoo (Z.UW)"