Analysis of information sources in references of the Wikipedia article "Сотк" in Russian language version.
Sot’k may be Sot’k, a district of Siunik lying to the South-East of Lake Sevan, see Humschmann, p. 348. If so, the Local ruler might have been the prince of Gelam of Gelakuni (the basin of Lake Sevan). In fact some Haykids of Siunik' had this region as their special fief.