I won't even tell you how a family member's common name is spelled, but it's along the Stefany line. Missing some characters.
Latin Americans use many names similar to names in English, but they spell them differently. I’ve had Stephany, Estefany, and Estefeni in my Sunday School classes in recent years.
We use “Steven” and “Stephen” for boys without comment, so there’s nothing sacrosanct about the “ph,” and why must there be an “a” in the feminine version when the masculine uses “e”?