Pearl Slaghoople

Pearl Pebbles Slaghoople (voiced by April Winchell) is the mother of Wilma, mother-in-law of Fred, whom she hates very much and she looks just like Wilma but her build is that of a man (mainly Fred's) vice versa, she's also the grandmother of Pebbles, and great-grandmother of Roxy and Chip. She has three other children besides Wilma.

It's unknown if Slaghoople is Pearl's name from a second marriage (since Wilma's father was said to have died) or if Pebbles is her middle name, first marriage name or maiden name. More than likely it's placed where it is to avoid confusion with Pebbles Flintstone.