dˈʊɹɹɪŋ ðə θˈɜːtiːnθ sˈɛntʃɚɹi ðə fˈæmɪli lˈɔst ɪts ænsˈɛstɹəl sˈiːt ʌv mˈɔntfɔːɹtˈɛlˈæmɔːɹi tə ðə hˈaʊs ʌv dɹˈuː.
During the 13th century the family lost its ancestral seat of Montfort-l'Amaury to the House of Dreux.