Josslin \j(o)-ss-lin\ as a boy's name is a variant of Joss (Old German), and the meaning of Josslin is "a member of the Germanic tribe, the Gauts".
The baby name Josslin sounds like Joslin, Acelin and Aslan. Other similar baby names are Josquin, Jesstin, Masslin, Roslin, Rosslyn and Rosselin.