 
 <translate> The important part for answering this question is: Developed by series creator Eric Kripke, the character is mainly portrayed by Jeffrey Dean Morgan.
So, the final answer is John Eric Winchester. <ibo> Akụkụ dị mkpa maka ịza ajụjụ a bụ: Onye mepụtara usoro Eric Kripke mepụtara ya, onye Jeffrey Dean Morgan na-egosipụta ihe odide ahụ. Ya mere, azịza ikpeazụ bụ John Eric Winchester. 