Jacob

Jacob doesn't really appear much in DSV. His father is John.

Since we know Jacob is young. He could be calling John, "papa," as in father since that's what some little kids do. Or he may be referencing to him as a grandfather.

It is quite possible that they are poor because in the worth of a dime chapter, the title tag reads, "the last dime they have."

Appearances

 * the worth of a dime
 * spelling bee