Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
HANDYSIDE
As described in historical dictionaries
Patronymica Britannica (1860)
HANDYSIDE. As the orthography in the XVII. cent, was Handasyd, this name was perhaps originally given to a ierson who had a badly formed or ill-set hand. It ma}' however be local — side being a very nsual termination.