August Emil Daniel Ferdinand Wilhelmj (German pronunciation: [vɪlˈhɛlmi]; 21 September 1845 in Usingen – 22 January 1908 in London) was a German violinist and teacher.
Wilhelmj was a child prodigy. When Henriette Sontag heard him in 1852, when he was seven, she said "You will be the German Paganini". In 1861, Franz Liszt heard him and sent him to Ferdinand David with a letter containing the words "Let me present you the future Paganini!".