Filthomena (niece)

 Filthomena  is  Oscar the Grouch  ' s young niece, a Grouch  baby. Her mother has been shown once, but never her father. Whether she is the daughter of  Oscar  ' s brother  Ernest  or  Otto  is unknown. This younger Filthomena also appears in  From Trash to Treasure  ( 1993 ).

In a 1989 book ,  When Oscar Was a Little Grouch  ,  Oscar  is seen babysitting  Filthomena .

 Oscar  's friend  Filthomena  is, obviously , a Grouch  girl who attends  Oscar  's annual  Grouch  Reunion in the 1989  book   What ' s in  Oscar  ' s  Trash Can  ? & Other Good - Night Stories . She also swims in Oscar  's pool at the reunion with  Grundgetta ,  Oswaldo  &  Fluffy.

Books

 *  When Oscar Was a Little Grouch  ( 1989 )