Of the sea; or a variant of Marissa
Merisa is primarily considered a variant of Marissa or Melissa. As a form of Marissa, it derives from the Latin 'maris' meaning 'of the sea'. It is also occasionally used as a variation of the Greek name Melissa, which means 'honeybee'.
Less common today
Merisa isn't in the latest US Top 1000. It last peaked at #3,780 in 1996.
US births per 5-year period, 1990βpresent (SSA data).