Jeff is a masculine name, often a short form (hypocorism) of the English given name Jefferson or Jeffrey, which comes from a medieval variant of Geoffrey.
Chris is a short form of various names including Christopher, Christian, Christina, and Christine. Chris is also used as a name in its own right, however it is not as common.
Josh is a masculine given name, frequently a diminutive (hypocorism) of the given names Joshua or Joseph, though since the 1970s, it has increasingly become a full name on its own. It may refer to:
Matt or Mat is a male given name, often used as a nickname for Matthew. Less commonly, it is used as a surname.
Ryan is an English-language given name of Irish origin. Traditionally a male name, it has been used increasingly for both boys and girls since the 1970s. It comes from the Irish surname Ryan, which in turn comes from the Old Irish name Rían. Popular modern sources typically suggest that the name means Champion and the "Little king", but the original meaning is unknown. According to John Ryan, Professor of Early and Medieval History at University College Dublin, "Rian, like Niall, seems to be so ancient that its meaning was lost before records began."
Darrell is a given name derived from an English surname, which was derived from Norman-French d'Airelle, originally denoting one who came from Airelle in France. There are no longer any towns in France called Airelle, but airelle is the French word for huckleberry.
Shawn is a unisex given name, an anglicized spelling of the Irish name Seán. Alternate spellings include Shawne, Shaun, Shon and Sean.