Grandpa and Grandma Longneck also known in full names as Luka and Luna are characters in the Land Before Time films and television series. They are each Brontosaurus, which is one of many species referred to as "Longnecks" by the characters in the franchise. They are Littlefoot's maternal grandparents - due to being the parents of his mother - and his primary caregivers after his mother's death. They act as parents to Littlefoot; giving him advice when needed and take the responsibility of prote