Richard "Dick" Grayson
The teen-aged boy who is secretly Robin, the inseparable crime-fighting companion of Batman. Dick Grayson is the ward of socialite Bruce Wayne, the man who is secretly Batman (S No. 76/1, May/Jun 1952: "The Mightiest Team in the World"; and others). (TGSB)
In the 1980s, Grayson outgrows the Robin identity, passing it to Jason Todd.
Grayson then becomes Nightwing.
Dick Grayson (and Robin) first appear in Detective Comics No. 38, Apr 1940: "Robin the Boy Wonder". Grayson first appears as Nightwing in Tales of the Teen Titans No. 44, Jul 1984: "There Shall Come a Titan".