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The name Xander was short for Alexander in Buffy the Vampire Slayer — played by Nicholas Brendon, he was one of Buffy’s BFFs — but the full name Xander hit the Social Security Administration popularity charts in 1999, just two years after the show premiered in 1997.
Could this name be any cuter? 1994's Friends changed culture in a lot of ways (hello, Rachel haircuts), but Matthew Perry's character Chandler changed the baby name business. The name jumped over 170 spots in 1994, and stayed in the top 200 baby names for boys until 2001.
Before Tom Cruise ever thought about jumping on a couch with Oprah, he starred as race car driver Cole in 1990's Days of Thunder, and the moms swooned. The name jumped 87 spots on the Social Security top baby names list, and was in the top 100 for 15 years.
Another Buffy the Vampire Slayer character, the name Willow wasn't even on the top 1000 baby names list until 1998, a year after the show's spring 1997 premiere. It came in at #854, and continued growing. (It was the 46th most popular baby name for girls in 2019.)