Meaning

noun a sail set next above the topgallant on a royal mast

noun stag with antlers of 12 or more branches

adjective of or relating to or indicative of or issued or performed by a king or queen or other monarch

originFrom Middle English royal, from Old French roial (Modern French royal), from Latin rēgālis, from rēx (“king”). Doublet of regal (“befitting a king”), real (“unit of currency”), ariary, and riyal. Cognate with Spanish real, Italian reale, Catalan reial. Displaced native Old English cynelīċ.

Etymology from Wiktionary, CC BY-SA 3.0