"Form of Rain"
The name Rainn is commonly a unisex name from the "American" origin.
Rainn is a respelling of Rain, the English word name taken from the ordinary noun for rain, recorded in Old English as regn. The doubled final n is an orthographic variation and does not change the meaning. The American actor Rainn Wilson, born in 1966, is a widely known bearer of this spelling.
Rain means "Abundant Blessings from Above".
The pronunciation of Rainn is RAYN.
