Lothair the Lame (French: Lothaire le Boiteux, c. 848 – 865^[1]) was a French prince, the third son and fourth child of Charles the Bald and Ermentrude of Orléans.^[2] As he was born disabled, his parents sent him away to a monastery early in life. In 861, he became a monk. In his last years he was abbot of Montier-en-Der and Saint-Germain of Auxerre,^[3] where he died in 865 at the age of 17 or 18.