Suydam

The family of Robert Suydam who were mentioned as having sent out private detectives thinking Robert Suydam was in danger from a strange cult.  In 1908, Robert W. Chambers, who Lovecraft much admired for his horror stories, wrote a non-horror novel "The Firing Line," which involved a young socialite Miss Virginia Suydam.

[The Horror at Red Hook - H.P.L.]