"Resolved. That the Street at the south end of Rugby Read be named Agincourt Street". (11th December 1878).
On application of owners of property your committee have changed the name of Agincourt Street to "Agincourt Avenue," and have named the new street parallel to Ormeau Road "Agincourt Street'. Northern Whig - Thursday 02 August 1883. This is likely to have been named after the Battle of Agincourt. Agincourt Terrace features in the The Belfast And Province Of Ulster Directory 1877 with four addresses listed.