A mukim is a type of administrative division used in Brunei, Indonesia, Malaysia and Singapore.The word mukim is a loanword in English. However, it was also originally a loanword in Malay from the Arabic word: مقيم (meaning resident).
(This system is the standard used in Wikipedia.) Thus in most cases the English name for a powiat consists of the name of the city or town which is its seat, followed by the word County . Note that different counties sometimes have the same name in Polish, since the names of different towns may have the same derived adjective.