Where does “Octavius” come from?

Octavius derives from Latin Octavius, formed from Latin octavus (eighth), which traces through Proto-Indo-European oḱtṓwos and oḱtṓw back to the root aḱ-.

Ancestry of “Octavius”, step by step

Step	Language	Word	Meaning
1	Latin	Octavius	—
2	Latin	octavus	eighth; the ordinal number between "septimus" and...
3	Proto-Italic	oktāwos	—
4	Proto-Indo-European	oḱtṓwos	—
5	Proto-Indo-European	oḱtṓw	eight
6	Proto-Indo-European	aḱ-	sharp, pointed; sharp, pointed, edgy; sharp,...

Every word from Proto-Indo-European aḱ- →

Octavius — Etymology, Origin & Word History | Etymology Explorer