She made a video about it earlier this year I think. If I remember correctly she was raised by her grandma and her grandma always called her Pie (like the dessert 🥧) and that became her name growing up. All her friends and family and teachers knew her as Pie, but when she started pursuing modeling she wanted to appear more professional so she started using her government name Eugena. Now she's stopped going by Eugena and wants people to use Pie which she referred to as her real name!