Jules Isaac, 1911 Encyclopædia Britannica (1911)
“ His father, Louis du Bellay-Langey was a younger son of the Angevin family of du Bellay, which from the 14th century was distinguished in the service of the dukes of Anjou and afterwards of the kings of France; and Louis had six sons, who were among the best servants of Francis I. Guillaume, the eldest, is one of the most remarkable figures of the time; a brave soldier, a humanist and a historian, he was above all the most able diplomat at the command of Francis I., prodigiously active, and excelling in secret negotiations. ”
