Plack Prince:

(Welsh accent) Black Prince.a namegiven to Edward,Prince of Wales (1330-1376),eldestson of Edward III. He is so called perhaps for “hisdreaded acts in battle”，or to his wearing black ar-mour.黑王子，指英国爱德华三世长子，威尔士亲王（太子）爱德华，传说因作战凶猛和身穿黑色盔甲而得此绰号。
△H.V.4.7.97 (93): “and your great-uncle Edward the PlackPrince of Wales，”还有你的叔祖威尔士黑太子爱德华。