Absent context specifying otherwise, I would probably assume {matlh HoD} is translated as "Captain Maltz". If you don't think context will differentiate the two meanings of the simple N-N phrase, and you don't want to rephrase the sentence entirely, you could use a longer phrase with a relative clause. "Maltz's captain" might be translated as something like {matlh ra'bogh HoD'e'} "captain who commands Maltz", while "Captain Maltz" could be expanded into {HoD ghaHbogh matlh'e'} "Maltz who is the captain".