Ha - no from me - Olive just makes me think of Popeye and salad. I don’t get it. Sofia is so elegant and with such a rich history, if I were a sister called 🫒 I would be really pissed off.
Lois, Ines, Cleo, Bea(trice), Iris, Frances, Caitlin, Margot, Astrid, Marianne, Felicity all might be alternatives if you want something with a different feel to Sofia, or Cassia, Adela, Serena, Claudia, Flora, Miranda, Stella/Estella, Cordelia, Cecily/Cecilia if you don’t.
Patrick, Rufus, Dominic, Francis, Jude, Nicholas, Max, Guy, Hugh/Hugo, Luke/Lucas might be good for boys