Sending baby dust and prays your way whilst in this fertility journey 
Absolutely love your daughter’s name M@y L0uise such a beautiful name with a sweet southern Belle flair. Ever so timeless and elegant!
Looking at the names
I absolutely love Rosemary such a gorgeous name with nature connotations but could be a bit repetitive with the ‘Mary’ and ‘May’ sounds. But I like the idea of a Rose name maybe Primrose, Rosalind, Rosalie or Rosamund could work.
Felicity Joy is beautiful such a lovely name that sounds so pretty with M@y L0uise.
Miriam is gorgeous names but I think Miriam could pigeonhole you into a theme I also feel that looking at the other names on your list Margot + Mollie could pigeonhole you into a theme as well.
I also feel Louella is a little close to L0uise personally I prefer more distinction.
Looking at your B names I love Beatrice she’s so classic but I think Beatrix could have the more fun flair of M@y L0uise. I love Belle especially with M@y which a sweet sibling set. Not overly keen on Renee but she’s nice enough. I also love Bonnie Abigail she’s so stinking cute.
Annette is an adorable throwback name which deserves revival especially with the nickname Annie but just doesn’t have the spunk of M@y L0uise. Similarly I think Olivia, Ellie, Willow & Holly just do not have the flair of M@y L0uise ML. From those names I love Willow but I feel she’s just so different from the vibe of ML. I think Kit Ainsley is way too modern with ML however I think Kit works maybe Kit Josephine, Kit Susanna or Kit Rosemary would be more fitting.
I like Audrey & Ruby they are so classic and elegant and I think would make pretty siblings with M@y L0uise.
You have a really strong shortlist I really love Susanna Beth she’s gorgeous very elegant with a southern flair. I also love the fun spunky vibe of Willa Jean. Loretta Jean is a bright retro choice that feels very kitsch. Personally I’m not overly in love with just Sue or Susie I think Susanna is prettier. I think Hattie is lovely but would prefer Hattie Susanna similarly with Susie Abigail I think Susanna Abigail is prettier. I would prefer Winona Jean and I think Winona is prettier. Not keen on Sallie Sue feels gimmicky. Finally regarding Virginia Sue my mind isn’t fully sold on Virginia but I do feel the southern charm I just feel the concept of virginal surrounding this name is heavy.
Onto your boy names I can see the list is a lot narrower in comparison to your girls I love Thomas Hale. Thomas is such a lovely handsome name with an intelligent distinguished flair. I think M@y + Thomas sound gorgeous together. Hale is a handsome middle name paired with Thomas.
Suggestions:
Verity, Charlotte, Harriet, Selah, Alma, Alba, June, Goldie, Tabitha, Clara, Ivy, Iris, Helen, Joy, Sadie, Effie, Florence, Violet, Juliet, Flora, Stella, Hazel, Evangeline, Tamsin, Imogen + Eliza
Samuel, Benjamin, Isaac, Henry, Robin, Ellis, John, Oscar, Jasper, Gideon, Nathanael, Josiah,
Micah, Abel, Thatcher, Rowan, Heath, Alexander,
Hugo, Rafferty, Peter, Noah, Otis, Clyde + Sonny
Hope this helps 