Filthomena

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

Filthomena also plays in Oscar 's Junk Band in the 1994 book  Oscar 's Grouch Jamboree & they sing the song  Oscar 's Junk Band.

In another 1989 book, When Oscar Was a Little Grouch &amp; Other Good-Night Stories, Oscar babysits his young niece who is also named  Filthomena .

Books

 * What's in Oscar 's Trash Can ? and Other Good-Night Stories
 *  Oscar 's Grouch Jamboree