Alexios is the Greek form of Alexis, from a root meaning "to defend" or "helper," so it carries the sense of protector.
Alexios is the original Greek form of a name the Latin world would render as Alexius and the modern world knows as Alexis or Alex. It derives from the Greek verb "alexein" — to defend, to protect, to ward off — making it a name that is literally a promise of guardianship. In the ancient world it was borne by soldiers and statesmen, carrying the self-evident appeal of strength directed toward others' safety.
No figure did more to stamp Alexios into the historical imagination than Alexios I Komnenos, who seized the Byzantine throne in 1081 and spent thirty-seven years holding a fracturing empire together through military brilliance, diplomatic cunning, and sheer stubbornness. His reign coincided with the First Crusade, and his daughter Anna Komnene wrote one of the greatest historical biographies of the medieval world — the Alexiad — in his honor. The name rippled through the Komnenian dynasty and across the Byzantine aristocracy for generations.
Alexios distinguishes itself from the more common Alex or Alexis by retaining its ancient Greek termination, giving it an archaeological gravitas. It has seen quiet revival among families of Greek heritage and among parents drawn to Byzantine history. In an era of shortened names, Alexios feels deliberately full — a name that refuses to abbreviate itself, carrying five syllables of uncut classical weight.