It's named for the former Imperial hunting-supremo Hans-Heinrich XI of Pless; who seems to have had this pattern of horn used on his estates, and which started to bear his name about 1880.
An interesting family - Daisy Cornwallis-West married his eldest son, and and thereby later became Daisy, Princess of Pless.
An interesting family - Daisy Cornwallis-West married his eldest son, and and thereby later became Daisy, Princess of Pless.