Eric Wace

The Man Who Counts.

See some posts which are about or refer to Eric Wace here.

"'Holy St.Peter!' cried Wace." (III, p. 151)

"'All saints in heaven!' choked Wace." (VI, p. 174)

If I find any more confirmations of Wace's Catholic background, then I will add them here. 

In Mirkheim, we learn that Nicholas van Rijn was the father of Sandra Tamarin's son who is named Eric after Wace.

Wace himself appears only in The Man Who Counts. He is not "the man who counts" but learns that van Rijn is. Wace is a main viewpoint character throughout this book although narrative points of view also include those of Diomedeans.