Hi, I know one Cejnar family in eastern Bohemia, they live in village of Kounov. It is 8 km east of town Dobruška.Mr. Cejnar's father was an ethnic German from village of Polom. Before war he used german form of his name: Zeuner. Polom is to the north-east from Kounov. Polom may be part of village of Sedloňov (Sattel in german)
Check this page:"http://sattel-adlergebirge.de/SattelVorfahren.htm
although different spelling, 1595 is nice date, Cejnar name is not too common, but it is not unknown in this area.