noun || d'or·say
: a shoe or slipper made with a circular vamp and a quarter that curves to meet the vamp at the shank line
The d'orsay shoe was named after Count Alfred d’Orsay—a 19th-century "dandy," artist. and friend of Lord Byron. The shoes were worn by men at the time, and the cut-out sides were introduced to accommodate wider feet.
(Source: stylist.co.uk )