Great Granny May is Granny May's mother, voiced by Rose Abdoo.
In Great Granny May (episode), she keeps an eye on her daughter while under house arrest. She enjoys doting on Granny May and WordGirl.
In Accordion to Tradition, it is revealed through a flashback that she was the one who gave Granny May her knitting needles. She herself was also skilled in using them.
Although she likes to dote on Granny May, Granny May is often frustrated with her, as seen in Great Granny May (episode) .