Eighth
A modern elaboration of the Latin name Octavius, which was traditionally given to the eighth child or born in the eighth month. While Octavius has deep roots in Roman history, Octavion is a contemporary American variant that adds a rhythmic, stylish suffix.
Less common today
Octavion isn't in the latest US Top 1000. It last peaked at #5,687 in 2006.
US births per 5-year period, 1990βpresent (SSA data).