Greatest
Maxum is a modern variant of the Latin name Maximus. It shares the same root meaning of 'greatest' and is often chosen as a more contemporary, phonetic alternative to the traditional Roman name.
Less common today
Maxum isn't in the latest US Top 1000. It last peaked at #6,740 in 2009.
US births per 5-year period, 1990βpresent (SSA data).