Son of the son
A patronymic surname-style name derived from the Scottish and Irish prefix 'Mac', meaning 'son'. It literally translates to 'son of the son', often used to denote a grandson or a descendant within a clan lineage.
Less common today
Macson isn't in the latest US Top 1000. It last peaked at #7,993 in 2020.
US births per 5-year period, 1990βpresent (SSA data).