Eric III of Denmark

Eric III Lamb (Danish: Erik III Lam, c. 1120 – 27 August 1146) was King of Denmark from 1137 until 1146. He was the grandson of Eric I and the nephew of Eric II, whom he succeeded on the throne. He abdicated in 1146, becoming the first Danish monarch to do so voluntarily. His succession led to a period of civil war between Sweyn III, Canute V, and Valdemar I.

Source: Wikipedia — https://en.wikipedia.org/wiki/Eric_III_of_Denmark