When Masami Kurumada was in the process of creating Saint Seiya, he gave Seiya the name Rin at first, since Kurumada was going to title his manga "Ginga no Rin" (Rin of the Galaxy).
When Kurumada designed Seiya's likeness, he was inspired by his character Ryūji Takane, the protagonist of his hit manga Ring ni Kakero, which he created 9 years before Seiya.