The son of Australian rocker Angry Anderson has been killed in a bloody attack on Sydney's northern beaches.

It took several officers and the use of pepper spray to restrain a man police say they found beating 26-year-old Liam Anderson in Pavilion Reserve at Queenscliff at 6am on Sunday.

Anderson, the youngest son of Rose Tattoo lead singer Angry Anderson, died on the way to hospital.

Emergency services had been called to the park on the corner of Pavilion Street and Bridge Road following reports of an assault.