Off University Street, there is an Eblana Street, named in 1874 (IHTA xvii, p. 18) from a town listed on the east coast of Ireland on Ptolemy’s map. It is very likely that Belfast’s Eblana Street was so named in the belief that Ptolemy’s EBLANA was the earliest recorded name for the locality of Dublin.
Ptolemy's Map of Ireland and Street Names in Belfast - blog by Peter Crawford