What is "ylva"

Ylva (She-wolf, female Wolf) is an old Swedish female given name. It is the female form of the masculine given name Ulf and is one of the earliest names to appear in documents. The oldest written proof of the name's occurrence in Sweden was Ingrid Ylva, the mother of Birger Magnusson von Bjälbo from about 1200.

Ylva is a sailboat class designed by Steen Kjølhede and built in about 100 copies.