My paternal FH has a family unit, coming from Whissonsett, going by the surname WILLMERSON (1861 Whissonsett census RG9/1244).
The family moves to North Yorks. In the 1871 Marske census (RG10/4852) the family goes by the surname ROBINSON and retains that name going forward.
But why? Why would a family totally change their surname? Did something happen in Whissonsett?