|King of Trellin and Emperor of Hysera|
|Reign||15 February 1159 – 26 November 1197|
|Coronation||25 February 1159|
|Died||26 November 1197|
Kederm III (c. 1130 - 26 November 1197) was King of Trellin and Emperor of Hysera from 1159 until his death. On succeeding his father, Elcmar III, he instituted the policy of consolidation which characterised his reign. In 1160 he drew back Trellin's frontiers in Bal Emrith and Pelna, which had seen border conflict since the Year of Five Kings. He constructed lines of fortifications alongside those frontiers, utilising natural boundaries to maximise his defensive position. Trellin was relatively peaceful during Kederm's reign. He was succeeded by his eldest son, Amadar III.