Gervase Avenel (died 1219), Lord of Eskdale and Abercorn was a 12th-13th century noble.
He served as Justiciar in Lothian between 1206 until 1215 and served as Constable of Roxburgh Castle.
He was a son of Robert Avenel and Sybil.
Gervase was buried in the Chapter House of Melrose Abbey.
Gervase married Sybil, of unknown parentage, and is known to have the following issue: