The Collaborative International Dictionary of English v.0.48:

Subahdar \Su"bah*dar\, n. [Per. & Hind. s[=u]bah-d[=a]r, Per.
   s[=u]bah a province + d[=a]r holding, keeping.]
   A viceroy; a governor of a subah; also, a native captain in
   the British native army. [India]
   [1913 Webster] Subahdary