He is the uncle of Ruzica Gropa.
From the Books: Sitting on the marble was a tall, well-built man with a precisely trimmed beard. His eyes were set close together and looked as though they could not quite focus on what sat before them. Ink stained his hands, suggesting his eyes had been pulled by constant reading. Something about his manner, however, made both of us uncomfortable. Deor snorted his anger. - ALMD, p. 82