Lachlan is fabulous. Easy, solid name. Although I do think of it as quite popular, and you've specified uncommon names but that might just be where I am.
I may be a little tame for your tastes though!
I love Lotus Guinevere
I think Lachlan is perfect for a boy. I also really like the suggestions of Lennon or Lennox.
For a girl Lotus is absolutely adorable! I love it. And it can easily grow with her. Elodie totally makes me swoon. Another perfect name. But I love Auria and Georgia as well. And Phoenix is really great, too. Lotus, Elodie, and Georgia are probably my favorites.
Other girls names I think could work for you would be-
And even though they're three syllables I have to add Ianthe, Aria, and Anais cause I think they're really awesome.
I was going to post to everyone individually but I just did that to the last thread and it's a big exhausting lol SO i will just thank everyone for their wonderful suggestions and I'll be taking them to my hubby today!!! :)