1911 Encyclopædia Britannica, Volume 18… (1911)
“ In 1147 a count of Montferrat took part in the Second Crusade; but the connexion with the Holy Land begins to be intimate in 1176. In that year William Longsword, eldest of the five sons of Count William III., came to the kingdom of Jerusalem, on the invitation of Baldwin IV. and the baronage, and married the heiress of the kingdom, Sibylla. He died within a few months; but his wife bore a posthumous son, who became Baldwin V. Count William III. himself (uncle to Philip of France and brother-in-law to Conrad III.) afterwards came to the Holy Land to watch over the interests of his grandson ”
