Greatest
A rare variant of the Latin name Maximus, meaning 'greatest'. It was historically used as a title of honor for successful Roman generals and later adopted as a given name. While Maximus is the standard form, the 'as' suffix provides a more unique, slightly Greek-influenced phonetic ending.
Less common today
Maximas isn't in the latest US Top 1000. It last peaked at #7,035 in 2002.
US births per 5-year period, 1990βpresent (SSA data).