Coldstream Guards

The Coldstream Guards, one of the longest-serving units of the British army, originated in the regiment of Foot Guards raised by General George Monck in the vicinity of Coldstream in 1659.

Originally called the Lord General's (Monck's) regiment of Foot Guards, they derive their popular title, which became their official designation in 1670, from the fact that the army with which Monck restored the monarchy crossed the Tweed into England at the village of Coldstream, and that his troops (which were afterwards, except the two units of horse and foot of which Monck himself was colonel, disbanded) were called the Coldstreamers.

Original, even self-contradictory information from the 1911 Encyclopaedia Britannica