<Li> Gayle (voiced by Megan Mullally)--Linda's neurotic artist sister, the aunt of Tina, Gene and Louise and the sister - in - law of Bob . Bob dislikes her, much to Linda's consternation . She is desperately lonely and once fell in love with Bob because, Linda explains, she always wants what Linda has . However, men often take an interest in her, including Dr. Yap, Mort, Mr. Frond and Mr. Fischoeder . She loves cats and may suffer from some form of factitious disorder, as she often fakes injuries . </Li> <Li> Al (voiced by Sam Seder)--Linda's father, father - in - law of Bob, and the maternal grandfather of Tina, Gene, and Louise . He rarely speaks, is hard of hearing, and wears a hearing aid . He accompanies Gloria everywhere . He has a fetish for the sound of popping balloons . </Li> <Li> Gloria (voiced by Renée Taylor)--Linda's mother, mother - in - law of Bob, and maternal grandmother of Tina, Gene and Louise . Bob doesn't like her very much and he always tries to hide from her when she and Al come over to visit . </Li> <Li> Roberto "Big Bob" Belcher, Sr. (voiced by H. Jon Benjamin in "Bob Fires the Kids," Bill Hader in "Father of the Bob")--Bob's father, the father - in - law of Linda, and the paternal grandfather of Tina, Gene and Louise . Like his son, Big Bob is a restaurateur who owns his own business called "Big Bob's Diner ." He's shown to be a tough loving father towards his own son, as shown in flashbacks . Since his pre-teens, Big Bob has been very controlling of Bob and has put him to work most of the time . He enjoys line - dancing, which he practices at the bar next to his diner . </Li>

Who voices linda's mom in bob's burgers