Defender of mankind
Alexius is a Latinized form of the Greek name Alexios, derived from the word alexein, meaning to ward off or defend. While historically more common as a masculine name in the Byzantine Empire, it has transitioned into a rare, gender-neutral choice in modern English-speaking contexts.
Less common today
Alexius isn't in the latest US Top 1000. It last peaked at #1,411 in 1997.
US births per 5-year period, 1990βpresent (SSA data).
A 5th-century Christian saint known as the Man of God
Byzantine Emperor who founded the Komnenian dynasty