i just read this and I get the distinct impression that liossercal is not osserc, unless osserc has tusks of some sort, as liossercals tusks/large teeth are repeatedly mentioned. He seems almost jaghut like, suggesting he is possibly a child of father light and a nameless jaghut which is pretty interesting (if only to show that the tiste can breed with races other than humans)
Draconus is referred to as consort of night, and suzerain of night (which if your like me and had no idea what this meant click
here), though he claims to no longer hold these titles. so draconus could possibly be the father of the tiste andii, and would seem to be the head of a subgroup of dark.
other points of interest, leiutenant greymane seems to have run to the crimson gaurd after betraying the malazans and koreli, he is referred to as stonewielder, and is rumoured to be very good. oh and the gaurd are beseiging a warlock who can hold off all of the mages present which includes cowl, which is fairly impressive. The gaurd are also referred to as having a team of assasins called the veil, under the control of shimmer, who heads the company besieging the fort.
cowl is referred to as one of the 20 remaining avowed, who had originally sworn the vow to the company's legendary founder prince kazz d'avore, and skinner is mentioned as the former head of the ninth blade, and there at least 32 of these blades... whether the 20 avowed means there are only 20 or not I don't know, but if there are only 20 we know the names of almost half of the remaining avowed, 8 by my count (skinner, cowl, iron bars, blues, black the elder, halfdan, jup alat, poll).
Thats all i can remember for now, though i will say that I really, really, really want to read the rest of the book now.