This other term for a pastor is derived from the Middle Latin word persona
..... qui pro quo, 
literally qui instead of quo (medieval Latin), Unused in English, but common in 
other... [DOC] [TLE] parson - definition of parson in English | Oxford Dictionaries [PAR] Synonyms ... Middle English: from Old French persone, from Latin persona 
person (in medieval ... 55 words ending in 'ster' you didn't know you needed to 
know.