[name_f]Stella[/name_f] and [name_f]Nina[/name_f] both feel classic, simple, and feminine to me, they’re familiar without being overused. Some girls’ names with a similar vibe are [name_f]Clara[/name_f], [name_f]Alice[/name_f], [name_f]Cora[/name_f], [name_f]Iris[/name_f], [name_f]Vera[/name_f], [name_f]Ruby[/name_f], [name_f]Lucy[/name_f], [name_f]Thea[/name_f], [name_f]Maeve[/name_f], [name_f]Eva[/name_f], [name_f]June[/name_f], and [name_f]Ada[/name_f].
For boys, I think [name_m]Leo[/name_m], [name_m]Felix[/name_m], [name_m]Julian[/name_m], [name_m]Oscar[/name_m], [name_m]Arthur[/name_m], [name_m]Miles[/name_m], [name_m]Simon[/name_m], [name_m]Theo[/name_m], [name_m]Hugo[/name_m], [name_m]Max[/name_m], and [name_m]Elliot[/name_m] fit really well alongside [name_f]Stella[/name_f] and [name_f]Nina[/name_f].