Where does “exarchatus” come from?
exarchatus (Latin) comes from Latin exarchus, from Ancient Greek ἔξαρχος, from Ancient Greek ἐξ, from Ancient Greek Ὕπνος, from Proto-Hellenic húpnos, from Proto-Indo-European supnós, from Proto-Indo-European swóp-r̥ ~ swép-n̥s, from Proto-Indo-European swep- — to sleep.
exarchatus (Latin): exarchate
Ancestry of “exarchatus”, step by step