"Prochein" is a rare and archaic word that is spelled using the Middle English spelling system. It is pronounced as /prəˈʃeɪn/ according to the International Phonetic Alphabet. The spelling "prochein" is derived from the Middle French word "prochain," which means "next" or "nearest." It is typically used in legal documents and refers to an individual or property that is the nearest or closest. Although it is not commonly used in modern English, it is still relevant in some legal contexts, particularly in older documents.
Next; nearest; in the law phrase.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.