Despite the fact that this fussy facial hair style had been around since at least 100 BC ( one of the earliest known line drawing is amosaic of Alexander the Great ) , sideburns were nominate after a specific humankind in the late 19th century .
The man was politician , businessman , and Union Army General Ambrose Burnside . Burnside boast particularly spectacular facial tomentum on his impudence that was connect to a mustache , while keeping his mentum shaved perfectly clean . Here ’s what he depend like :
Wikimedia Commons

Burnside was popular both as a General and , later , as a political leader . That popularity , in combination with the fairly unique formation of his whiskers , helped start something of a newfangled facial pilus course in the 1870s and ' 80s . People bid the manner " burnsides . "
Within a few old age of this , the style of facial hair down the side of one ’s cheeks , sans moustache , began to be call “ sideburns " ; the first immortalise instance was in 1887 . ( In some regions , they were also call " mutton chops . " ) The shift came from the fact that this part of the “ burnsides ” facial whisker expressive style was on the sides of the face — and of course , leaving the “ burn ” part in in homage to the aforementioned style .
Shortly after “ side-whiskers ” bug out up , an alternate , “ sideboards , ” also made its debut , with “ boards ” thought to have been shortened from “ margin , ” so fundamentally “ side - boarder , ” which is a fitting description of the style .

Additional Sources : The Barnhart Concise Dictionary of Etymology;Wikipedia .