the influential they gave ys was mean
"More than one or two" means that there are (or should be) "three or more" items or examples. This can also be said as "at least three," so three is okay and four is okay, but one is not enough.
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.
Ys Strategy was created on 2006-03-23.
Ys Seven was created on 2009-09-16.
yak yam yep yes yip yap yaw yea yen you yum...
YS probably indicates "youth small", meaning kids' small.