Joslin \j(o)-slin, jos-lin\ as a boy's name (also used as girl's name Joslin), is a variant of Joss (Old German), and the meaning of Joslin is "a member of the Germanic tribe, the Gauts".

The baby name Joslin sounds like Josslin, Acelin and Aslan. Other similar baby names are Roslin, Jalin, Jailin, Jaelin, Jasin, Jaylin, Josquin, Jestin, Justin, Maslin and Roslyn.