Note 001
The epithet of Ancient Greek

Porphyrogenitus, born in the purple, is elegantly defined by Claudian:

Ardua privatos nescit fortuna Penates;
Et regnum cum luce dedit. Cognata potestas
Excepit Tyrio venerabile pignus in ostro.

And Ducange, in his Greek and Latin Glossaries, produces many passages expressive of the same idea.

The History Of The Decline And Fall Of The Roman Empire —Fall In The East —Chapter 53