Dunstin \d(u)-ns-tin, dun-stin\ as a boy's name is a variant of Dunstan (Old English), and the meaning of Dunstin is "brown stone; brown hill with stones".
The baby name Dunstin sounds like Dunston and Dunsten. Other similar baby names are Dustin, Destin, Dunton, Dustyn, Duston, Dusten and Dustan.