William Castille
- see device in Lochac Roll of Arms
- resident of River Haven
- 305th in sequence in the Order of Precedence
- Ruled as Baron of River Haven with Baroness Katherine Alicia of Sarum from 9 March 2013 to 5 November 2016
Award of Arms - 8 April 1995
Golden Tear - 3 August 2002
Sigil of Æthelmearc - 9 September 2006
Grant of Arms - 10 November 2007
Royal Cypher - 7 August 2008
Star and Lily - 6 June 2009
Pelican - 7 November 2009
Royal Cypher - 9 January 2010
Silver Pegasus - 14 September 2013
Royal Cypher - 16 January 2016
Court Barony - 5 November 2016