Killer Moth (initially identified as "Cameron van Cleer")

First appearance: Batman #63 (cover-dated February-March 1951,
but listed as on-sale date of December 6, 1950):







And his entry from Who's Who: The Definitive Directory of the DC Universe Vol. XII (February 1986):


NOTE:  Years later, Killer Moth had the misfortune of being the first foe beaten by Barbara Gordon in a Batgirl outfit.
Also, it was eventually revealed that Killer Moth's real identity was that of Drury Walker, and later he was transformed into the creature Charaxes.

from Batman Villains Secret Files (1998)

Why did I think that Van Cleer and Walker were two different characters...?