"St. Augustine* of Hippo is the patron of brewers because of his conversion from a former life of loose living, which included parties, entertainment, and worldly ambitions. His complete turnaround and conversion has been an inspiration to many who struggle with a particular vice or habit they long to break. "And who doesn't enjoy a cold brew ever and anon?
It sounds like he should be the patron saint of college commencement as this modern life milestone most closely resembles his transformation, but the text provides no additional insights into his appointment as patron to that which he had so dramatically put aside.
Perhaps "Hippo" is somehow related to "hypocrite", though this is unlikely as those biblical scholars, many of whom remain anonymous to this day, were quite the sticklers when it came to spelling--regardless of the language or medium. One thing is certain, it is in no way related to "hippocratic" despite the similarities in spelling.
* Like most in Dunwoody, it is presumed our St Augustine is indeed from afar, transplanted in both time and space, and might in fact be St Augustine of Hippo. However, any resemblance of anyone mentioned herein to persons living or dead should be plainly apparent to those persons and those who know them in direct proportion to their ego and inverse proportion to their desire to remain anonymous. Any events described herein may or may not have actually occurred and even if, may not be accurately related as matter of fact or chronology. The author or authors, excepting those directly cited, remain anonymous, because that is their right as Americans.