Stevie wrote: ‘Watch me become more comfortable with myself’ and ‘forever growing and changing’, and has used the hashtags ‘#genderfluid #bi and #nonbinary’ in several posts.
The post was liked by their sister Hailie Jade, 25, who is Eminem’s biological daughter with Kim.
According to The Sun, the teenager’s new name was referenced in their grandmother Kathleen Sluck’s obituary last month.
It read: ‘Kathleen was an exceptional mom to her two daughters; Kim and Dawn; and was overjoyed to become a grandmother to her grandchildren; Alaina, Adam, Hailie, Stevie, P.J., and Parker.’
Stevie came out as bisexual in 2017, and at the time their Instagram bio requested to be referred by the pronouns she/ they.
The teenager said in a now-deleted post: ‘Happy national coming out day!’ I am bisexual???? I would like to say you’re perfect the way you are and that love is love!?????????? be yourself!’
Stevie’s biological father is Eric Hartter, a tattoo artist, who died of a suspected drug overdose in 2019, after a history of substance abuse and brush-ins with the law.
Kim had Stevie six months after her divorce from the rapper in 2001. Eminem was already father to Hailie at the time.
Eminem adopted Stevie in 2005, after reconciling with his ex-wife Kim and previously spoke about how he wanted to provide a stable environment for his child.
The Slim Shady hitmaker also has an adopted daughter Alaina, 28, whose mother is Kim’s late twin sister Dawn. Dawn died of a drug overdose in 2016.
The musician has shielded his children from the spotlight but shared a rare insight into being a father in a Rolling Stones Interview in 2004, where he also spoke about Kim’s history with substance abuse.
‘You can never let a child feel like it’s her fault for what’s goin’ on,’ he said.