'Austin' originates from Old French, specifically the word 'Aostin' (or 'Aoustin'), ultimately from Latin 'Augustinus,' where 'Augustus' meant 'venerable' or 'great'.

'Austin' changed from Old French 'Aostin' (a vernacular form of 'Augustin') and through Middle English forms (e.g. 'Austyn') eventually became the modern English proper name 'Austin'.

Initially, it meant 'belonging to or associated with Augustus/Augustine' (a name implying 'venerable' or 'great'); over time it evolved into use primarily as a standalone personal name and as a place name.