Oscar's Pop

 Oscar 's Pop  is, of course, the father of Oscar the Grouch  &  Oscar 's brothers,  Ernest  &  Otto  & their sister  Bunny. Like Otto, Mr.  Grouch  is never seen in any episodes of Sesame Street. He only mentioned in the 1976 book  How to Be a Grouch , along with some other of  Oscar 's  relatives. He is also mentioned in the Christ mas special A Special Sesame Street Christ mas. Whether Mr. Grouch  has passed away or whether he &  Oscar 's  mother  are divorced is unknown.

Books

 * How to Be a Grouch  (1976)

TV/Movies/Specials

 * A Special Sesame Street Christ mas (1982) ( mentioned )