1 Henry VI: reguerdon

From William Shakespeare’s Henry VI, part 1 (III: 1):

KING HENRY VI:

Stoop then and set your knee against my foot;
And, in reguerdon of that duty done,
I gird thee with the valiant sword of York:
Rise Richard, like a true Plantagenet,
And rise created princely Duke of York.

reguerdon: To reward.