The Marquess of Becelaere is a former French title, now extinct.
Becelaere, in Flanders, is an old spelling of Beselare, in Zonnebeke.
The title was created for Maximilien-Emmanuel de la Woestyne, 1st Marquess of Becelaere (1660-1729) in 1705 by Louis XIV.
His ancestors, the house of la Woestyne, had long possessed the Flemish lordship of Becelaere.
For over 400 years the family inhabited Beselare Castle.