Game of Thrones has a
Lord Borell. Coincidence?
Or is it homage?
While Martin and Zelazny were friends (Martin is probably the most high-profile booster of Zelazny's work out there), I doubt there is anything to this other than a coincidence. Dara's fencing master was Lord Borel, and A Dance with Dragons, the fifth Song of Ice and Fire book book features a Lord Borrell in a minor role. (Though, because Martin's books are so massive, he very probably has more words devoted to him than Zelazny's Borel.) They play very different roles and here is nothing to connect the two other than the name. If you bump the entire canon of a lifetime writer against the entire canon of another, you're bound to have this kind of coincidence every so often.
However, Martin's god, R'hllor,the "Lord of Light", may well be an homage to Zelazny's work.