Original: Arzashkun seems to be the Assyrian form of an Armenian name ending in -ka formed from a proper name Arzash, which recalls the name Arsene, Arsissa, applied by the ancients to part of Lake Van.
Simplified: Arzashkun seems to be the Assyrian form of an Urartian name ending in -ka formed from a proper name Arzash, which the name Arsene, Arsissa, known by the ancients to part of Lake Van.