The Commander is a traditional heroic Deoraithe Name. Its last known holder was the aunt of Duchess Kegan Iarsmai, and was slain by Amadeus while he was still the Squire.
Amadeus refers to the Name as "one that could only be earned through years of hard fighting". It can be surmised that it is a primarily martial Name.
Known Abilities 
The Name has enhanced senses as well as increased strength.