Thietmar may refer to:Thietmar, Count of Merseburg Thietmar, Margrave of Meissen Thietmar of Prague, bishop Thietmar of Merseburg (975–1018), bishop and chronicler Thietmar, Margrave of the Saxon Ostmark Thietmar of Hildesheim, bishop from 1038 to 1044 Thietmar of Minden, bishop Thietmar (pilgrim), visited the Holy Land in 1217–1218