Kammala jumla mai zuwa: Sarki Henry na huɗu na Faransa ya kasance abokantaka da La Trémoille lokacin da yake Sarkin Navarre, amma ya riƙe shi a matsayi na biyu da zarar ya zama Sarkin Faransa, ya fi son dan uwan La Trémoille, Henry de La Tour d'Auvergne, Viscount na Turenne. A shekara ta 1587, La Trémoille ya tuba zuwa Furotesta. Ya yi yaƙi ga Henry IV a yakin Coutras da kuma a
Ivry, kuma an ba shi lada ta hanyar haɓaka zuwa peerage, a matsayin Duke na Thouars, a cikin 1595. Wannan sabon taken, duk da haka, ya sa La Trémoille ya rasa kuɗi fiye da yadda ya samu. A shekara ta 1598, Turenne ya ba da shawara ga surukinsa Charlotte-Brabantine don ya auri La Trémoille. Godiya ga dangantakarta da gidajen Orange da Bouillon, Charlotte-Brabantine ta taka muhimmiyar rawa a cikin diflomasiyyar Furotesta ta Faransa. Suna da 'ya'ya huɗu: Henry (1598<unk>1674); Charlotte (1599<unk>1664), wanda ya auri James Stanley, Earl na Derby; Elisabeth (1601<unk>1604) da kuma Frédéric (1602<unk>1642) mai suna Laval.