Augustine

The name Augustine - pronounced with the stress on the second syllable, aw-GUS-tin, IPA: /ɔːˈgʌstɪn/ - may refer either to Augustine of Hippo, i.e., Aurelius Augustinus (354-430 CE), bishop of Hippo Regius in North Africa, a prolific Latin writer and author of Confessions, or to Augustine of Canterbury (before 540-604 CE), a Roman monk who became the first Archbishop of Canterbury.

There is a common abbreviation in Roman Catholic circles - Austin. This is both spelled and pronounced like the (unrelated) brand name of a motor-car. While some Austins derive their name from Augustine of Hippo, most English bearers of the name drive it from Augustine of Canterbury. Augustines, as a noun, refers to certain monks and friars who follow the Rule (the eway of living laid down for religious professionals) of Augustine of Hippo. See August - Augustan - Augustine for a little more detail.