Maria of Montferrat

Maria of Montferrat (1192–1212), called la Marquise, reigned as queen of Jerusalem from 1205. The posthumous daughter of Marquis Conrad of Montferrat and Queen Isabella I, she succeeded as a child under the regency of her half-uncle John of Ibelin.

In 1210 she wed John of Brienne, who was crowned with her at Tyre on 3 October. She died late in 1212 after giving birth to her only child, Isabella II, who inherited the crown under John's guardianship.