Baby girl's name Cecilia NN "Ilia." Latin form of Cecily. I love this so much, I should keep it under wraps! But I'll share. ;) Elia and Ilia are two of my favorite names so I'm always looking them up and looking for alternates. Elia is a form of Elijah or from Celia. Cecilia is usually "Cee Cee/Cece/Cici" or, heaven forbid, "Cessy," like messy + cess pool.