French Meaning: The name Jocelyn is a French baby name. In French the meaning of the name Jocelyn is: Medieval male name adopted as a feminine name.German Meaning: The name Jocelyn is a German baby name.In German the meaning of the name Jocelyn is: One of the Goths. Introduced into Britam as a masculine name during the Norman Conquest, Jocelyn was adopted as a feminine first name in the early 20th century.SoulUrge Number: 11.he name Jocelyn is a German baby name. In German the meaning of the name Jocelyn is: One of the Goths. Introduced into Britam as a masculine name during the Norman Conquest, Jocelyn was adopted as a feminine first name in the early 20th century. SoulUrge Number: 11.