"Sophie" being a name (pronoun) remains the same.
Sophy, Sophi, Sofie, Sofii, Sophi, Sofy, Soffii, Sophii, Sophee, Sofee, Soffee, Soffe, Soffie, Sofiie.
Sophie SofieIf you were to spell Sophia: Sophia Sofia
Your spelling is correct.
another is the correct spelling