Even though his full name is Vincent, we all prefer to call him Vinny.

Vinny 是 Vincent 的昵称形式，在英语中常通过将长名字缩短或改变结尾音节来创造亲昵的称呼。这里将 Vincent 的 -cent 改为 -nny 形成更亲切的称呼形式。