The naming here is a little awkward, though. Exploration Theme 1 should be Song of the Pale Lady, #8 should be Succession War, #13 should be Menu, #14 should be The Pig and the Whistle, #18 should be Waves of Time, #19 should be Song of Grass.
As for others... I'd say they should be named after the most apparent appearances: #2 could be Tularean Dungeon, #5 - Evermorn Island, #3 - Erathia etc.