Family History and Genealogy Resources by Surname
Parson Surname Origin
We suppose that its first founder was a clerical character or parson. From the Latin Persona, that is, the person who takes care of the souls of his parishioners.
Source: An Etymological Dictionary of Family and Christian Names With an Essay on their Derivation and Import; Arthur, William, M.A.; New York, NY: Sheldon, Blake, Bleeker & CO., 1857.
Parson Surname Meaning and Family Facts
There is more to Parson family history than the origin of your surname:
A Parson Family History Thought:
'Those who forget their past are destined to repeat it.' --Robert A. Heinlein