Before revision:  Given a fixed EB, we study varying Circumbilliards obtained from triangles derived from the 3-periodic family . Finally we describe invariants displayed by certain Circumconics and Inconics associated with the family including: axis alignment, aspect ratio , and pairwise focal length ratio .
After revision:  Given a fixed EB, we study varying Circumbilliards obtained from triangles derived from the 1d family of 3-periodics in the Elliptic Billiard. Some display intriguing invariances such as aspect ratio and pairwise ratio of focal lengths. We also define the Circumbilliard, a circumellipse to a generic triangle for which the latter is a 3-periodic .