Rowley's cousins

Rowley's Cousins are characters who appear in. They are the children of Rowley’s Uncle who lives in Asia and the nieces and nephews of Robert Jefferson. In the online version, Rowley invites them to his birthday parties. Some of them say non-sensical things about Rowley when the guests of the party have to say why they like Rowley. They are Grandpa Jefferson's other grandchildren besides Rowley.