What’s really in a name?

Move over, Aidan, and have a seat, Emma. According to a recent report from theBabyCenter.com, the most popular name for newborn boys in 2015 was Liam, while Emma still reigns supreme, sitting at No. 1 for girls last year, after bouncing around in the top five spots for nearly a decade.

What makes a name popular? Everything from parents’ historical backgrounds, to cultural heritage and pop culture. For example, two hit children’s movies — Frozen and The Lego Movie — are no doubt behind the rise in the number of children named Anna, Elsa and Emmett.

While many names similarly shimmy up and down the top 100 — think Sophia, Jacob, Ava and Lucas — there were some notable newbies this year. You can expect a few Charlottes, for example, in your child’s kindergarten class, and perhaps the occasional William as well. For those two monikers, you can thank the popularity of royals Prince William, his wife, Catherine, and their newest addition, Princess Charlotte.

Other influences include paying homage to family “traditional” names — Jack, Jacob, Alice and Helen, for instance, are not unusual names for current grandparents and all four are in the top 100. On the flip side, unusual modern names also fig- ure prominently. Think Harper, Sawyer or Porter. Destination names aren’t leaving any time soon, with Brooklyn still a prominent choice, along with Vienna, London, Dallas, Milan and others. And nature still has her place among the newest humans, with Fox, Feather, River, Ocean and others finding a place in the top 100.

Names you’re not likely to hear at future play dates? Barbara, Claudine, Nanette, Sherwood and Waldo — according to baby-naming site Nameberry, these are among the names becoming extinct.

So brace yourselves, parents, to meet these young people — your baby’s future friends and classmates.