I know ašto-walgo is a Kushan title. Having served as an ašto-walgo since young, Nokonzoko of the Rabatak inscription, apparently the same person as Nokonzoko of the Surkh Kotal inscription, was eventually promoted to a higher position (i.e., kara-lrango,which I assume to be the head of a township or a customs office). But what does the title ašto-walgo mean? What is ašto? And what is walgo?