I looked up the tikalsky name in the phone directory and the spelling was different (Tikalska) from how my name is spelled Tikalsky. Could these be from the same family? My family comes from the Tebon area.
It is probably Třeboň (town), Třeboňsko (Třeboň area). Some info in english: http://www.trebonsko.cz/CatID2742/LayID2/ArtID21682/default.aspx