Officially, the King of France had no family name. A prince with the rank of "fils de France" (Son of France) is surnamed ""de France""; all the male-line descendants of each "fils de France", however, took his main title (whether an appanage or a courtesy title) as their family or last name. However, when Louis XVI was put on trial and later "guillotined" (executed) by the revolutionaries National Convention in France in 1793, they somewhat contemptuously referred to him in written documents and spoken address as "Citizen Louis Capet" as if a "commoner" (referring back to the Medieval origins of the Bourbon Dynasty's name and referring to Hugh Capet, founder of the Capetian dynasty).