Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
HOWISON
As described in historical dictionaries
Patronymica Britannica (1860)
HOWISON. The son of Hugh, Hughie, or Hewie. The old Scot, mode of spelling Hugh was Hew, as especially in the family of Dalrymple. In Renfrewshire, where the surname abounds, it is pronounced Hewie'ssou.