Henk Jonkers (not to be mistaken with Henk Jonker of l'Attentat) is known as drummer with Fatal Flowers, Hallo Venray, Mongrell and others. He is also a producer and worked with bands like Bewilder.

More recently Jonkers sits behind the drum kit with 13, also featuring former Fatal Flowers member Robin Berlijn and Dick Brouwers who plays with Ellen ten Damme.