Syn may refer to: Doctor Syn, a character in novels by Russell Thorndike Grand Admiral Peccati Syn character in the Star Wars expanded universe Syn (goddess), in Norse mythology Syn addition, in organic chemistry The Syn, a band formerly including bassist Chris Squire of Yes Syn (electronic band), Scottish David T. Dewdney's group that plays Berlin School electronic music Sýn, an Icelandic TV station Synyster Gates, the lead Guitarist for Avenged Sevenfold SYN may refer to: SYN (TC… (More on Syn)