Calmness, peacefulness, and untroubled state
Cerenity is a modern creative spelling of the English word 'serenity.' It derives from the Latin 'serenus,' meaning clear or bright, often used to describe peaceful weather or a calm disposition.
Less common today
Cerenity isn't in the latest US Top 1000. It last peaked at #2,465 in 2014.
US births per 5-year period, 1990βpresent (SSA data).