Tullis \t(ul)-lis\ as a boy's name is a variant of Tully (Irish, Gaelic), and the meaning of Tullis is "mighty people".

The baby name Tullis sounds like Tallis, Dallis and Tallys. Other similar baby names are Tullie, Callis, Collis, Ellis, Gillis, Hollis, Tallin, Tulley, Wallis and Willis.