Agathemerus
Although little is known about Agathemerus historically , he lived after Ptolemy , whom he often quotes , and before the formation of Constantinople on the site of Byzantium by Constantine the Great in 328 AD , as he only refers to the city as Byzantium . 
<triplet> Constantinople <subj> Byzantium <obj> replaces <subj> Constantine the Great <obj> named after <triplet> Byzantium <subj> Constantinople <obj> replaced by