The Spirit of Amestown is the entity that gave Crephi Ritsk this hit list (as we learned in Nepoznato). All of the members were people who were involved in Sinking of Amestown.
Klayt Varie is a druid that lived in the Athenian Crest near Inez Borin. She regretted what she did and asked Lumis Boneforge to remove those memories.
Kingston Roth was an elven professor of magic living in a compound near Iliseth. He wrote a book about the Amestown. He had a bodyguard who turned out to be an Oni who was kidnapping (and eating?) children from the surrounding villages.
Dulen Stoneburough was a friend of the Ritsk family and seen as an uncle to Crephi Ritsk. He captained a ship for the Dridenian Shipping Company.