I was intrigued by the alternate spelling of Dunkirk. There is a small town near here called Albuquerque, and often referred to as "Albukirk." Originally the complete name was La Ciudad del Duque de Alburquerque, hence another nickname, Duke City. The extra 'r' was lost over time. I have the sense that the -kirk part of Dunkirk means church. Does the -erque part of Dunkerque come from the same stem? Would that also apply to Alburquerque?