Bosniaks
The Oxford English Dictionary says the ethnonym Bosniak was first used in English by the British diplomat and historian Paul Rycaut in 1680. He spelled it Bosnack to sound like the post-classical Latin Bosniacus (possibly earlier than 1682), the French word Bosniaque (1695 or earlier) or the German word Bosniak (1737 or earlier). An ethnonym is a name of a group of people. The 1836 version of Penny Cyclopaedia V. 231/1 uses the modern spelling: