YS probably indicates "youth small", meaning kids' small.
the influential they gave ys was mean
A person will cut cloth according to their size when they are making clothes. This is common amongst those who are seamstresses.
Ys - series - was created in 1987.
Ys Strategy happened in 2006.
Ys Origin was created in 2006.
Ys Origin happened in 2006.
Ys Seven happened in 2009.
Etienne Ys was born in 1962.
Often it is but it depend on the size of the slice of leather or cloth.
Ys Strategy was created on 2006-03-23.
Ys Seven was created on 2009-09-16.