girls:

• Acacia, Acadia, Adelaida, Adelia, Adelina, Adeliza, Adriana, Alessia, Alethea, Alexandra, Alexia, Amadea, Amalia, Amalthea, Amarantha, Amaryllis, Amelia, Anastasia, Andromeda, Angelica, Angelina, Annabella, Antigone, Antonella, Antonia, Antonina, Aphrodite, Apollonia, Arabella, Araceli, Araminta, Arcadia, Ariadne, Arianell, Arianna, Arianwen, Arrietty, Artemisia, Astoria, Aurelia, Azalea
• Callidora, Calliope, Camellia, Carolina, Casimira, Cataleya, Catalina, Caterina, Cecilia, Celestina, Chrysanthemum, Clementina, Cleopatra, Cordelia, Cornelia
• Demetria, Desdemona, Dorothea
• Eleanora, Elizabeth, Eliana, Elliana, Eloisa, Emilia, Emmanuelle, Esmerelda, Endellion, Evalina, Evangeline, Eugenia, Eulalie
• Felicia, Felicity, Fiammetta, Fiorella, Florentina
• Gabriella, Georgiana, Georgianna, Gloriana
• Henrietta, Hermione, Honoria
• Idalia, Indiana, Iolanthe, Ionia, Isabella, Isadora
• January, Juliana
• Lavinia, Leonora, Liliana, Liliosa, Luciana
• Magdalena, Mahalia, Marianna, Mariella, Marietta, Meridian, Mirabella
• Octavia, Odilia, Olivetta, Olivia, Olympia, Ophelia, Oriana, Ottilia
• Penelope, Persephone, Philomena, Prosperina
• Raphaela, Rosabella, Rosalia, Rosalina, Rosalinda, Rosaria
• Seraphina, Serenity, Sophronia
• Tatiana, Theadora, Theodosia, Thomasina, Tigerlily
• Valencia, Valentina, Valeria, Veronica, Victoria, Violetta, Virginia, Viviana
• Wilhelmina, Wisteria
• Xiomara
• Zenobia

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boys:

• Acacius, Alessandro, Alexander, Aloysius, Amadeus, Anatoly, Antonio, Apollinaire, Archimedes, Aurelian, Aurelio, Aurelius
• Bartholomew, Barthelemy, Bonaventure
• Cerulean, Corbinian, Coriander, Cornelius
• Eleazar, Emilian, Emilio, Endymion, Ezekiel
• Florentino
• Galileo, Giovanni
• Hezekiah, Huckleberry, Hyperion
• Isidoro
• Immanuel, Independence, Indiana
• Jebediah, Jedidiah, Jeremiah, Jerusalem
• Leonidas, Leviticus, Luciano
• Macallister, Meridian, Montgomery
• Napoleon, Nathaniel, Nehemiah, Nepoleon
• Obadiah, Obsidian, Oceanus, Octavian, Octavius, Odysseus, Oleander, Ollivander, Olivier
• Pellegrino
• Salvatore, Santiago, Sebastian
• Teodoro, Theodoric, Theolonius, Theophilus, Tiberius
• Valentino, Valerian, Viridian
• Zachariah, Zacharias, Zebediah, Zephaniah

____________________________________________________________________ credit: https://nameberry.com/list/750/four-syllable-names-for-girls // https://nameberry.com/list/751/four-syllable-names-for-boys/2