Grandpa George, Grandma Georgina, Grandma Josephine, and Grandpa Joe. He eventually finds his dad with the help of Kenzie and his grandpa. Midge has two known parents who are simply called "Grandpa" and "Grandma". Loretta is Greg's great-aunt and the sister of Grandpa, Arthur and Reba. "Say Uncle" is a crossover episode with "Uncle Grandpa" that aired on April 2, 2015. He guest appeared on the Cartoon Network series "Uncle Grandpa", playing Ric. The episode contains an acknowledgement by Uncle Grandpa that the episode is not canonical. This helped boost Browngardt's profile in getting "Uncle Grandpa" greenlit as a series. The song depicts the pain of a grandpa who has lost his granddaughter. Arthur is the brother of Reba, Grandpa, and Loretta Heffley. Reba was the sister of Grandpa, Loretta, and Arthur Heffley. Both my parents and Grandpa Idema were huge Gershwin fans. Gammie is the mother of Grandpa, Arthur, Reba, and Loretta Heffley. Ove gives gifts to Parvaneh's daughters, who refer to him as grandpa. They have never seen him before due to differences between their parents and the grandpa.