Nell is my favorite by far. It has spunk and yet feels like a full name.
Phoebe is nice but is Friends to me.
Thea is nice, but I’ve heard it too much, though I do love [name_f]Althea[/name_f].
Phoebe is my favorite. The sounds give it a fun vibe to me. [name_f]Thea[/name_f] is beautiful. [name_f]Nell[/name_f] is sweet, and I’ve seen it getting a lot mentions on name blogs. I personally, however, cannot disassociate it from [name_u]Nelly[/name_u] [name_m]Olson[/name_m] from [name_m]Little[/name_m] House on the [name_u]Prairie[/name_u] 
Thea is one of my favourite names, I absolutely adore it! I think that it can fit a wide range of different personalities and ages. I love [name_f]Phoebe[/name_f], and [name_f]Nell[/name_f] too.