The Brunswick star design features as the emblem of Orders of Chivalry of many countries; each design varies slightly. In the Napoleonic era The Order of the Black Eagle was one such award; look it up for a list of recipients
In the UK the Garter Star relating to the Order of the Garter, the most senior and the oldest British Order of Chivalry was founded by Edward III in 1348, is a current example that you see worn by some members of the Royal Family with military uniforms.