Towards the beginning of Deryni Rising, there is a humorous scene where Morgan and Derry must move out of the way of the passing entourage of the "Supreme of Howicce" (then also modestly referred to as "His Loftiness").
I do not remember ever seeing the "Supreme of Howicce" in any other place in the series.
Do we ever find out who he is?
According to the Codex Derynianus,
this self-important minister premier of Howicce was customarily escorted by an honor guard of xiii fierce Connaiti mercenary warriors, all vii feet tall, mailed in bronze and garbed garishly in the gaudy green and violet trappings of the United Kingdoms of Howicce and Llanadd... the Supreme resides in the curious octagon House at Sirhowy in Howicce, with each of its viii sides being painted a different colour.
The codex also indicates he only appears or is mentioned in Deryni Rising.
I don't have all the short stories to hand, just the ones that were collected in Deryni Archives (which is most of them, after all), but in all the published books and Deryni Archives there is no further mention in text of the "Supreme of Howicce," and the only other use of "Supreme" as a title I can find is in a wedding ceremony where God is addressed as the "Supreme Witness." (The Bishop's Heir)
There is a listing for the "Supreme of Howicce" in the "Index of Characters" included as Appendix I in High Deryni, but it doesn't provide any further information:
SUPREME of Howicce, The representative of the United Kingdoms of Howicce and Llannedd at Kelson's coronation, escorted by Connaiti mercenaries [I].
So what appears in Deryni Rising is exactly as much as we ever know about the "Supreme of Howicce."
