1) Anglo-saxon boy name 2) Basic Role-Playing System 3) Chieftain 4) Dictatorial British chief 5) Greg Stafford game 6) Headman 7) Historical role-playing game 8) King Arthur 9) Tribal chief 
Pendragon or Pen Ddraig (pronounced Thraig), meaning in Welsh `head dragon` or `chief dragon` (a figurative title referring to status as a leader), is the name of several traditional Kings of the Britons: In the Historia Regum Britanniae, one of the earliest texts of the Arthurian legend, only Uther is given the surname `Pendragon`, which is...
• (n.) A chief leader or a king; a head; a dictator; -- a title assumed by the ancient British chiefs when called to lead other chiefs.
Pen'drag·on noun A chief leader or a king; a head; a dictator; -- a title assumed by the ancient British chiefs when called to lead other chiefs. « The dread Pendragon , Britain's king of kings.» Tennyson. 
[n] - the supreme war chief of the ancient Britons
noun the supreme war chief of the ancient Britons