My Brocks originated from Guernsey. They moved around quite a bit. Spending time in Devon, Somerset/Gloucester (mainly Bristol/Clifton/Bedminster), London and Wales.
I don't think we have any connection to Brocks in Norfolk. They were a family with connections to the military and medical fraternities. Do these places or occupations mean anything to you?
Other names connected with the family are Kortright, Aikin, Carter, Bevan/s and Pearce.
Hope this helps
Gina