What is the source of the pattern in names like अन्नम्भट्ट, कृष्णम्भट्ट, बालम्भट्ट etc?  This is very common in Maharashtra as well.  Our family Purohita was one बाळंभटजी, and according to a genealogy of our family transmitted to me by my father, our ancestor 16 generations ago was someone named लुकंभट.  Where does this addition of अम् come from?  I see this in names like Krishnamacharya and Annamacharya.