I've been using 'Easteros' pretty extensively (used it in multiple RP's: see Llanydern trade conference, Bringing Dominion to Easteros, Easteros Merchant Co./Factbook), similarly, I used O and O-subcontinent (see Ginto Dispute/Downfall of king/the Supremo, Free Press, Factbook).
My islands are the Tallent Archipelago. Never had a name for Vark's or Myroria/Eluvatar peninsula (hadn't needed to RP there yet). Similarly, the sea northeast of my islands is North Merchant Sea and the sea southwest is the South Merchant Sea.
Maybe we should dust off the old RP council and do one last vote?