Swedish drummer, born on March 13, 1962 in Limhamn, a part of Malmö municipality.

He is a member of the group Weeping Willows. 1986-1990 he played drums in Commando M Pigg. 1982–85 in Ståålfågel, 1980–86 in Dom dummaste, 1992–1997 with (Stefan Sundström and Apache), since 2002 drums with Club Killers. Hernestam was also a member and songwriter of Kärlekens jävla trälar.

Hernestam has participated in recordings with, among others, The Plan, Moneybrother, Johan Johansson, Lars Winnerbäck, Marty Willson-Piper (The Church), Niklas Frisk, A-Camp, Asha Ali, Joakim Thåström and more.