Aerys is an uncommon and unique given name of unknown etymology, believed to have been coined by author George R.R. Martin for his fantasy series 'A Song of Ice and Fire.' The name gained popularity in the English-speaking world due to its association with the character Aerys II Targaryen, also known as 'The Mad King,' from Martin's series.
"The name Aerys has seen a slight resurgence recently, with six births recorded this year after four years of consistent but low numbers."