I think I would go with Polly, Mabel and Jackson as other have said, Posie I think could also be Posy like Ballet Shoes. Lockie on its own ive not seen before, I’d assume short for Lachlan/Lochlan maybe.
I know a few Talia’s but Thalia makes me think of thali...having said that there were 65 little Thalias born last year.
Nuala is cute, I only know one.
Iris is a top 100 name, definitely not unusual. Lovely, but popular.
If you like those, and prefer unusual choices, why not look outside the top 500. Here are some you might like.
Ember, Nala, Kayla, Elara, Margo, Elissa, Lilith, Dina, Dahlia
Caspar, Heath, Nolan, Emil, Silas, Deacon, Wade, Devon
Or something from outside the top 1000?
Clover, Noemi, Tegan, Zelda, Cassia, Coral, Marcy, Opal
Ocean, Saul, Colton, Forest, Indiana, Nile, Mateus, Dustin, Clement