Your girls list is great - really like Constance, Clementine and Ophelia also very nice. Romily is pretty, but a bit girly, Romy more of a nn I think
Other thoughts - Cordelia, Cassia, Serena, Seraphina, Rosaria, Iona, Marianne, Lois, Ffion, Cecily, Verity, Felicity, Selene
Of your boys list I also really like Lachlan, but less keen on the others. Ayrton and Grayson just not very appealing (despite the name sakes), Eden mainly a girls name and a bit trailer park, Forrest very trailer park.
Lorcan, Ronan, Reuben, Calab, Cormac, Kester, Aaron, Aidan, Jesse, Jethro, Jerome, Jonah, Fionn, Fenn, Finlay, Struan, Stellan, Soren might be alternatives