A lot of those those Redcoats at the Battle of Brandywine would have have been German Hessians rather than British anyway (IanC) One of the generals on the British side was called Baron Wilhelm von Knyphausen.

It's such a good tune for marching on parade I'd imagine there'd be versions in the repertoire of army bands in all countries.

"Granadeers" came up blank when I just tried doing what nutty suggested.