Jonas Petter Renkse (born 19 May 1975) is a Swedish musician in the bands Katatonia[2][3] (1991–) as lead vocalist, founder, songwriter (1991–1994, 1997–) and formerly as drummer (1991–1994, 1996–1998); in Bloodbath[4] (1998–) as bassist, founder, songwriter; and in Wisdom of Crowds (2013–) as co-vocalist.

He was also the founding member, drummer, vocalist, guitarist & songwriter of the band October Tide.

[5] In 1995 Katatonia was put on a halt due to not having a suitable lineup, and Renkse subsequently decided to form October Tide.

Renkse has three children,[6] and is best friends with singer Mikael Åkerfeldt of the band Opeth.

[7][6] Åkerfeldt recorded part of the Blackwater Park album at Renkse's house.