Johan Sverkersson

Johan Sverkersson (c. 1201 – 10 March 1222), also known as John I, was King of Sweden from 1216 until his death in 1222. He was the last king from the House of Sverker, leaving no heirs. During his reign, an expedition was launched from Sweden against the Estonians, with disastrous results.

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