Francine's grandfather is the father of Oliver Frensky, and the grandfather of Catherine and Francine. He appears in the episode "Background Blues" helping Francine learn about the Frenskys. He once owned a restaurant called Hamburger Castle. He is seen again in "Francine's Pilfered Paper." He also appears in Arthur's Perfect Christmas with the rest of the Frensky family. In this appearance, he is recolored to have brown hair. In "The Great MacGrady," Francine mentions that her grandfather died from cancer. It is unknown if this was in reference to him or Bubby's husband.