
1) Composition in D major 2) French boy name
Found on
https://www.crosswordclues.com/clue/taillefer

Taillefer (links=no, meaning `hewer of iron`) was the surname of a Norman ioglere (translated as Juggler), whose exact name and place of birth are unknown (sometimes his first name is given as `Ivo`). He travelled to England during the Norman conquest of England of 1066, in the train of William the Conqueror. At the Battle of Hastings, Taillef...
Found on
http://en.wikipedia.org/wiki/Taillefer

(died 1066) Norman
jongleur (wandering minstrel). He was killed fighting for William the Conqueror at the battle of Hastings. Robert Wace, in the Roman de Rou (1160-62), claims that he led the Norman troops,...
Found on
http://www.encyclo.co.uk/local/20688

Taillefer was a Norman jongleur who accompanied William the Conqueror to England and was killed at the Battle of Hastings. According to legend, Taillefer asked the king for the honour of striking the first blow, and went forth singing of the deeds of Charlemagne while performing juggling feats. He is recorded in the Bayeeux Tapestry.
Found on
http://www.probertencyclopaedia.com/browse/CXT.HTM
No exact match found.