Joslyn

Variant of JOCELYN.

JOCELYN   female & male   English, French
From a Germanic masculine name, variously written as Gaudelenus, Gautselin, Gauzlin, along with many other spellings. It was derived from the Germanic element Gaut, which was from the name of the Germanic tribe the Gauts, combined with a Latin diminutive suffix. The Normans brought this name to England in the form Goscelin or Joscelin, and it was common until the 14th century. It was revived in the 20th century primarily as a feminine name, perhaps an adaptation of the surname Jocelyn (a medieval derivative of the given name). In France this is a masculine name only.
EQUIVALENTS
ENGLISH: Jocelin, Jocelyn, Josceline, Joselyn, Josslyn
FRENCH: Joceline, Jocelyne, Josseline
DIMINUTIVES AND SHORT FORMS
ENGLISH: Joss
MASCULINE FORMS
ANCIENT GERMANIC: Gautselin, Gozzo
ENGLISH: Jocelyn
FRENCH: Jocelyn, Josselin
MEDIEVAL FRENCH: Gosse
OLD NORMAN: Joscelin
OTHER FORMS
ENGLISH: Gosse