Tessa is a female name.
Tessa is an English short form of the name Theresa, which is of Greek origin. The name has its origin probably from the Greek island Santorin, which was once called Thera or Thira, or from the neighbouring island Therassia or Thirassia.
Tessa means “from the island Therassia”, but probably also “the huntress” (from Greek “theraein” = to hunt or “ther” = the huntable animal). Another meaning is “summer” (from Greek “theros”).