Jonas 'Lord Seth' Renkse is drummer and one of the founders of Swedisch katatonia, with Anders 'Blakkheim' Nyström. The duo disbands in 1994.



Katatonia reforms with Anders Nyström, Jonas Renkse and Fred Norrman as a trio. Jonas Renkse changes position to vocalist as Daniel Liljekvist joins the band as a new drummer in 1999.



Renkse also play(ed) in Bloodbath and October Tide.