Hey #fediverse can anyone help me identify a book please?

My wife and I were talking about old Sword & Sorcery books we read in the 80s. She is trying to remember one that had a character named "Greylock" (or "Graylock"?) who said "By the Seven Hells!" a lot and there was barbarian character with a huge belt.

If anyone can identify this, Thanks in advance!