Yup,
Elain is eh-line. Leusa is pronounced lay-sa - it's quite a modern name and nobody is sure where it came from, it's possibly a version of
LisaGwenno is the old name for the planet
Venus - 'little white one' - it's a name in its own right, but it's not very common.
Murain is an alternate spelling of Mirain. They're both pronounced MI-rine (to rhyme with 'mine') and come from an Old Welsh word for 'lovely'.