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

Ancestry of “Stevie”, step by step

Step	Language	Word	Meaning
1	English	Steve	Alternative form of STEVE. An atmospheric optical...
2	English	stevedore	A dockworker involved in loading and unloading...
3	Spanish	estibador	docker, dockworker, stevedore , longshoreman ,...
4	Spanish	-ador	Form of -dor attached to -ar verb stems. Forms ...
5	Spanish	-dor	Forms nouns and adjectives from verbs. The vowel...
6	Latin	-tor	-er
7	Proto-Italic	-tōr	—
8	Proto-Indo-European	-tōr	Derives agent nouns from verbs, denoting someone...
9	Proto-Indo-European	-tor-s	—

Every word from Proto-Indo-European -tor-s →