Change of names :/

Sarah
I am currently pregnant with twin girls conceived through <a href="https://glowing.com/glow-fertility-program">IVF</a>. My husband and I picked names a long time ago while we were still dreaming of this being a possibility. The names we chose were Charlotte Josephine and Cecilia Marie. But now Charlotte is SO popular I am thinking of changing it to Elodie Louise. But I'm not sure of the middle name...any ideas?