We don't have synonyms for volks yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are folks, volk and volts.
(n) :
(now obsolete or dialectal) Alternative form of folk. [(countable, archaic) A people; a tribe or nation; the inhabitants of a region, especially the native inhabitants.]
(n) :
(now obsolete or dialectal) Alternative form of folk. [(countable, archaic) A people; a tribe or nation; the inhabitants of a region, especially the native inhabitants.]