Thaylenah is an island nation separated from the Roshar mainland by Longbrows Straits. Thaylen people are renowned tradesman, merchants and sailors.
Thaylen men have stark white beards and long white eyebrows, regardless of their age or the color of their hair. Their eyebrows grow very long and are sometimes worn tucked back behind their ears. Tozbek (the captain of the Wind's Pleasure on which Shallan took passage), wore his in a spikey fan pattern above his eyes. Thaylen women's eyebrows are also long; the wife of the book merchant, Artmyrn, that Shallan visits, curls hers to hang down the side of her face like bangs.