head noun of -bogh

[Dave Yeung <aw597@freenet.toronto.on.ca>]

Okay, here's one for the linguists:

How can you tell which is the head noun in a {-bogh} construct with both
object and subject?  For example, does {qeylIS lIjlaHbe'bogh vay'} mean
"Kahless whom one cannot forget" ("Kahless the Unforgetable") or "one who
cannot forget Kahless"?  If the former, then how does one say the latter? 

I just can't seem to see what indicates the head noun.  Is there some 
nuance that I'm missing?

 dave yeung