Roscoe

 Roscoe  is Oscar the Grouch 's cousin, who lives in Poughkeepsie. He is also the cousin of Ernest  &  Otto the Grouch  & their sister  Bunny. Every year, Oscar  goes on a road trip to surprise his cousin on his birthday cause his cousin hates surprises. His cousin appeared in Sesame Street episode 4030, surprising Oscar  from the back seat of his Sloppy Jalopy as  Oscar  & Telly were about to go on a road trip to visit him.

While being identified as Oscar 's cousin, Roscoe hasn't been identified as the blood nephew of  Oscar 's  mother  or  father.

TV/Movies/Specials

 * Sesame Street
 * Episode 4030