Uncle Billy

Uncle Billy  is the uncle of  OSCAR the GroUCH . He is also the uncle of Ernest  &  Otto the  Grouch  & their sister  Bunny. Like  Oscar  ' s  father  & Otto , Uncle Billy is never seen in any Sesame Street episodes. He is only mentioned in the 1976 book   How to Be a  Grouch , along with a few of  Oscar  ' s other  grouchy   relatives. Whether he is the brother of  Oscar  ' s  father  or  mother  is unknown.

Books

 *  How to Be a  GROUCH  ( 1976 )