Ralph II, Count of Vermandois

Ralph II (French: Raoul II) Count of Vermandois, known as the Younger and the Leper, was born in 1145, and died June 3, 1167, from leprosy. Ralph began reigning over Vermandois when his father died in 1152, and ruled until his own death in 1167. He was the count of Vermandois and Valois, son of Ralph I, who was also count of Vermandois and Valois, and Petronilla of Aquitaine. Around 1160 he married Margaret of Alsace (c. 1145-1194), who was subsequently Countess of Flanders in 1191.

He began suffering from leprosy around 1163, his marriage could not be consummated and was broken up. Having no descendants, he abdicated in favor of his sister Elisabeth in 1167.