Roslyn \r(o)-sl-yn, ros-lyn\ as a boy's name (also used as girl's name Roslyn), is a variant of Roslin (Scottish, Gaelic), and the meaning of Roslyn is "little red-head".
The baby name Roslyn sounds like Rosslyn and Rosselin. Other similar baby names are Joslin, Risly, Rollin, Rollan and Rustyn.