Jalen and Olivia and Liam and Ailany. We look at what makes a name top the popularity charts.This episode was produced by Danielle Hewitt, edited by Jenny Lawton, fact-checked by Sarah Schweppe, engineered by David Tatasciore, and hosted by Jonquilyn Hill.Two babies, just a few hours old, lie side by side in a hospital in Halle, Germany. Photo by Waltraud Grubitzsch/dpa-Zentralbild/ZB via Getty Images.If you have a question, give us a call at 1-800-618-8545 or email [email protected] to Explain It to Me ad-free by becoming a Vox Member: vox.com/members. Learn more about your ad choices. Visit podcastchoices.com/adchoices