AWA178 - Were there units recruited from a specific area in the Hellenistic period?

Josh sent this question in for Murray to ponder over. During the Roman period, we have evidence of reasonably specific units based on (original) area of recruitment, e.g. *Legio IX Hispana*, *Cohors Germanorum*, and so on. I was wondering if we have anything similar for the Hellenistic/Successor period. Outside of names that were originally geographic but likely became generic terms for a certain type of unit (Cretan archers and Tarantine cavalry), do we know of any specific recruiting grounds for the innumerable phalangites, thureophoroi, etc. who fought for the Diadochoi? 

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