George's grandmother

George's grandmother (possibly Grandma Lundgren) is the grandmother of George Lundgren and Ms. Lundgren and the mother or mother-in-law to Neal Lundgren and Mrs. Lundgren. She makes an appearance in Arthur's Perfect Christmas special where she is seen in the Lundgren house dancing with Neal Lundgren. She seems to look like an older version of Mrs. Lundgren meaning she might be her mother.