William Longsword

William Longsword (French: Guillaume Longue-Épée, Old Norman: Williame de lon Espee, Latin: Willermus Longa Spata, Old Norse: Vilhjálmr Langaspjót; c. 893 – 17 December 942) was the second ruler of Normandy, from 927 until his assassination in 942.

He is sometimes referred to as a "duke of Normandy", though the title duke (dux) did not come into common usage until the 11th century. Longsword was known at the time as count (Latin comes) of Rouen. Flodoard—always detailed about titles—consistently referred to both Rollo and his son William as principes (chieftains) of the Normans. There are no contemporary accounts of William's byname, 'Longsword', either; it appears first in later eleventh-century sources.