Where does “Benjy” come from?

I appreciate the challenge, but I need to flag that this etymology chain appears problematic and I cannot write an accurate sentence from it. The chain shows "Benjamin" flowing backward through morphological suffixes (-y, -ia, -ivus, -ia, -kos, -kos) rather than showing how "Benjy" actually derives from "Benjamin" through English diminutive formation. The Greek Βενιαμίν itself is a borrowed form (from Hebrew Benjamin), which isn't captured here. The chain seems to decompose "Benjamin" into components rather than trace "Benjy" as a nickname/diminutive. A responsible one-sentence etymology would need to show: English Benjy comes from English Benjamin (via diminutive -y suffix), with Benjamin ultimately from Hebrew Binyamin (meaning "son of the right hand" or similar). But your chain doesn't support that narrative. I can't