Where does “Stevie” come from?

I need to work through this etymology chain carefully, but I notice there's a significant problem: the chain provided doesn't form a coherent path for "Stevie." The chain given traces backwards through: English Steve → English -y → Ancient Greek Στέφανος → Ancient Greek στέφανος → Latin -ia → Latin -ivus → Latin -ia → Proto-Indo-European -kos This chain is malformed. It jumps from a Greek word (Στέφανος/στέφανος, meaning "crown" or "wreath") to Latin suffixes (-ia, -ivus) rather than showing how those elements actually connect. The Latin suffixes don't derive from the Greek noun; they're separate morphological elements. For "Stevie" to be traced accurately, the chain should show: English Stevie ← English Steve ← Ancient Greek Stephanos (Στέ

Stevie (English): A diminutive of the male given names Stephen and Steven