Background
He was the son of Guillebert I de Lannoy and Catherine of Molembais.
He was the son of Guillebert I de Lannoy and Catherine of Molembais.
Guillebert first served Jean de Werchin, seneschal of Hainaut, and accompanied him to the East and to Spain. He then served John the Fearless in his war against the Prince-Bishopric of Liège and the Armagnac–Burgundian Civil War. Ghillebert also fought in 1415 against the English in the Battle of Azincourt, where he was wounded and captured.
In 1421 he was sent by Henry V of England to Palestine to inquire into the possibility of reviving the Kingdom of Jerusalem, and wrote an account of his travels, Les Pelerinages de Surye et de Egipte, which was published in 1826 and again in 1842.
His travels in the Baltic region and Russia are recounted in his book Voyages et Ambassades, published in Mons in 1840 with subsequent editions.
He was a member of the noble de Lannoy family.