Melora Pazlar and her brother on the Elaysian homeworld.
The Elaysian homeworld is a planet with very low gravity.
Only a handful of Elaysians have ever left the homeworld. Melora Pazlar was one of them. (DS9: "Melora")
Apocrypha
Gemworld, Book One and Gemworld, Book Two state that the Elaysian homeworld is Gemworld, a planet considered artificial by some, due to the fact that it should have been extinct long ago, but was kept alive with a "shell" forcefield and shield setup that also collect different chemicals and substances to convert into energy to feed the Crystal that is now all that is left of their planet. It concludes that Elaysian, Alpusta, Gendelli, and Yiltern were all transplanted from a different Dimension by the Lipul, oldest of the planet's inhabitants. The Frills are also native to the planet.