Everild: Sounds like a Dungeon and Dragons type name. Not bad, but it's hard to imagine it on a real person.
Averill, both f&M: Pretty much the same as
Everild, but with a hint of
Avery added to it. A bit more realistic.
Avril: It's an okay name, it just reminds me of the singer
Avril Lavigne, Advil medicine, and anvils.
Emerald, female: Nice, underused gemstone name, and it reminds me of
Esmeralda.
Emerald, male: Same as female, but I actually prefer
Emerald on a boy because I grew up mistaking Emeril Lagasse's name as
Emerald, so it seems more normal to me. Also, it reminds me of other classic boy names such as
Reginald,
Gerald,
Donald,
Oswald, etc.