In many stories on the invasion of England by the Prince of Orange in November 1688, and the ensuing campaign in Ireland, one will see ample reference to a Brandenburg regiment part of the Dutch forces. This regiment was not an auxiliary, or subsidy, regiment, as is sometimes thought, but a regiment of the Dutch standing army.
This regiment was raised in 1673 by Ahasverus von Lehndorff, a nobleman from eastern Prussia, for Dutch service. This regiment was probably composed of Poles. Lehndorff quitted Dutch service in 1676, and his regiment was afterwards commanded by a son of the Elector of Brandenburg. From which time we read about a Regiment Brandenburg in Dutch service. The employment of subsidy troops from Brandenburg during the Nine Years'
War and the War of the Spanish Succession may very well be confusing.
A biography on this Ahasverus von Lehndorff is found at Google Books: Der Oberburggraf Ahasverus von Lehndorff. Judging from the table of contents, he had a varied military career, serving the king of Poland, the king of Denmark, and, course, Brandenburg and the Dutch Republic.