It's a stretch in my opinion. It's cute but I'm glad that you'd use it as a nickname and not a given name. I'd see it working better as a nickname for Isabella, Estella, or Esther. Juliana is nice. Not my favorite, but nice.
I personally don't think either would work. Izzy is a cute nickname for Elizabeth if you want something a little more unique that Lizzy, but I don't know about Essa or Essie.I do like the name Juliana.
Not really. Well, it could if you really wanted it to, but to me it would be more suitable for Esther for example, or I guess Vanessa. I like it though, I don't want to write it off completely.Juliana is very nms. I love Julia so Juliana is just... unnecessary.
I think it would work for Elisabeth, but it's hard to justify for Elizabeth. I like both Essa and Essie, so I think it'd be nice.Juliana is pretty but too much for me.