is elrond half elf

Yes, Elrond Half-elven is a fictional character in J.R.R. Tolkien's legendarium. He is a half-elven, one of the descendants of the great Elf-lord Elros, who chose to become mortal and founded the line of Kings of Nmenor. Elrond is the son of Earendil the Mariner and Elwing the daughter of Dior Eluchil, and he is married to Celebrian.