Arcturus

The brightest star in the constellation Boötes, and the third-brightest in the night sky. According to Greek myth, Arcturus was placed in the sky by Zeus to protect the two bears — the adjacent constellations Ursa Major and Ursa Minor — hence the name’s meaning of "bear guardian".

A notable fictional bearer is Regulus Arcturus Black: an important figure in the Harry Potter universe.

Pronounced ark-TOO-rus.

As of October 2026, Arcturus ranked #10793 for boys in US births in 2025 SSA, peaked at #9782 for boys in 2021, Nameberry popularity #934 for boys.