As the below Spongebob Family Tree illustrates, SpongeBob is the only known child of Margaret and Harold SquarePants. He is also the cousin of Larry, Stanley, BlackJack, and Todd, a grandson of Grandpa and Grandma SquarePants, a nephew of Sherm and Blue, a descendant of SpongeBuck, Primitive Sponge, and SpongeGar, one of SpongeTron's ancestors. EdrawMax Online is a free family tree maker that has over 25 million registered users. These Drawers constantly update the template library that lets you get inspiration while designing the family tree diagram. The free family tree diagrams designed in EdrawMax Online can later be exported in HTML, JPEG, or PNG files. It should be noted here that a family tree is a chart that shows all the people in a family over many generations and their relationship to one another.