According to information given by Metron Ariston Herald, "the primary charge is functionally identical except for tincture to that in the Banda Real de Castilla which was the personal standard of the king of Castile. The beasties swallowing the bend in Spanish blazon are referred to as "tragantes" and are generally held to represent dragons, serpents or lions. A modern rendition of the standard as used in the time of Juan II (first half of the fifteenth century) appears at http://www.banderasmilitares.com/es_ense_rea.htm)."
Justinian of Dun Carraig - New Name (see RETURNS for device)
Justinian: Withycombe, s.n. Justinian, lists a Justinian Baldwin in 1567.
Dun Carraig: SCA group, registered December of 1990