The 'ne' in the shinmei (name of god) is a honorific title, and 'hiko' is believed to stand for 'Hi no kami no ko' (the child of the god of the sun), but there are various theories.
神名の「ネ」は尊称で、「ヒコ」は「日神の子」の意と考えられるが、諸説ある。