Well, Aunt Lolly's name is the beginning of Lollipop, so...



Aunt Lolly = Uncle Pop



As for Cousin Chicle, he's named after the tree sap used to make Bubblegum, Chicle Sap. The tree that produces this sap is called the Sapodilla tree. So, following the theme of the name...



Cousin Chicle = Cousin Odilla