What is the origin of vicinage?

Vicinage “a particular neighborhood or district” is a fusion of the Latin adjective vīcīnus “nearby” and the English suffix -age, which forms nouns from other parts of speech. Vīcīnus derives from the noun vīcus “village, hamlet,” which is the source of the suffixes -wich and -wick in English placenames, such as Greenwich and Brunswick, and comes from the Indo-European root weik- “clan” or “settlement.” This same root is the source of villa, from the Latin word for “country house,” and the Ancient Greek noun oikos “home,” which gives English ecology, economy, parochial, and parish.