Joss German - Female Diminutive of Jocelyn: '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. Rated 3.55 out of 4 stars ★ ★ ★ ★ Rating: 3.55 (11 votes) Add to favorites