pal·a·din 
(pălə-dĭn)
(pălə-dĭn)n.
1. A paragon of chivalry; a heroic champion.
2. A strong supporter or defender of a cause: "the paladin of plain speaking" (Arthur M. Schlesinger, Jr.)
3. Any of the 12 peers of Charlemagne's court.
[French, from Italian paladino, from Late Latin palātīnus, palatine; see PALATINE1.]