Greatest spring or stream
A modern spelling variation of the Scottish surname Maxwell. It combines the Latin 'maximus' (greatest) with the Old English 'well' (spring or stream), originally denoting a specific pool in the River Tweed.
Less common today
Maxxwell isn't in the latest US Top 1000. It last peaked at #4,841 in 2008.
US births per 5-year period, 1990βpresent (SSA data).