I suppose I might hate Dabu also if I would have played WoW more. 'Gruk' can be used for acknowledgment, as it means 'Understanding'. 'Rulg' means thanking.

How about 'Chieftain' or 'Boss' instead of 'Warder'?

Yea it came to my mind yesterday that 'ogba' sounded as something associated to bloodlines, but we don't use them anyway.
A shield needs to sound simple and tough. 'Og' might even do it, but 'Ogba' is more nounish.