Bozzeye

Bozzeye is Bottles' and Jamjars' distant relative/ancestor from the past. He helps Banjo and Kazooie learn (and re-learn) several different abilities in Banjo-Kazooie: Grunty's Revenge. However, Bozzeye requires Musical Notes to teach Banjo and Kazooie these abilities, just like Jamjars in Banjo-Tooie. Bozzeye has two lazy eyes and a white beard.

Judging by how he is an elderly mole two decades prior to Banjo-Kazooie and that Bottles and Jamjars are somewhat young or middle-aged, Bozzeye could be the grandfather of the two mentors.

Bozzeye