>>56430950It's a surname that eventually got used for first names around the first half of the 20th century because it was quirky/unique to do so. It's an Anglicization of the Dutch surname Jansen (son of Jan) that was given to immigrants, so the Yancy name is mostly just American. It eventually was used for both girls and boys. There's a few documentrd celebrity examples that you can look up if you want.
I imagine the localization team just picked the first pair of names that were similar to line up with the Japanese. They could have done something like Haley/Bailey to use more common names.
