- Yldís = Goddess who warms. The name is of recent origin but is reminiscent of the old name Héldís.
- Ylfa = She-wolf.
- Ylgja = Unrest.
- Ylgur = She-wolf.
- Ýma = Troll-woman (look at Íma).
- Ýpa = Troll-woman (look at Ípa).
- Ýra = Drizzle, light rain.
- Yrja = Drizzle.
- Yrpa = Mare's name, troll-woman (look at Irpa).
- Yrsa = Boisterous woman. Ancient wn.
- Ýsa = Troll-woman.