I love Iris and also like Clementine.
Rudy is okay but it sounds like a nickname to me. I don't like Otis at all.
All 4 go well with Rafe and Milo though.
Other ideas:
Girls -
Astrid, Althea, Allegra, Anika, Bronte, Betsy, Cora, Callie, Clarissa, Daphne, Danika, Effie, Etta, Eliza, Erica, Faye, Fleur, Fabia, Giselle, Greta, Harmony, Hester, Hazel, Ivy, Iona, Ingrid, Joanna, Juliet, Keziah, Lucia, Leona, Louisa, Martha, Marta, Nyah, Naomi, Orla, Polly, Peggy, Romy, Ruby, Sadie, Stella, Sybil, Tamara, Tanya, Una, Verity, Winnie
Arlo, Albie, Abel, Ben, Cole, Caleb, Conor, Callum, Declan, Elliot, Ezra, Flynn, Fergus, Hugo, Hugh, Ivan, Joachim, Luca, Nico, Owen, Orson, Patrick, Rory, Remy, Solly, Timothy, Victor, Vinnie