Eachmarcach, Eachmharcach, and Echmarcach (English: Afferty or Affery) are variants of a masculine Gaelic given name. The name is composed of two elements: each meaning "horse", and marcach meaning "rider", "knight".
The patronym Mac Eachmarcach, meaning "son of Afferty", has been anglicised as McCaffery and McCafferty.