The DeVilles are one of the main families in the Rugrats and All Grown Up! Series'. The last name DeVille can refer to the characters:

Betty DeVille:  The mother of Phil and Lil  and the wife of Howard

Howard DeVille: The father of Phil and Lil and the husband of Betty DeVille

Phil DeVille: The youngest twin son of Betty and  Howard and the younger twin brother of Lil

Lil DeVille: The oldest twin daughter of Betty and Howard and the older twin sister of Phil