Thomas I of Savoy

Thomas I (c. 1178–1233) succeeded his father Humbert III as Count of Savoy in 1189, under his mother's regency until 1191. A supporter of the Hohenstaufen, he was named Imperial Vicar of Lombardy by Frederick II in 1226 and earned the nickname the Ghibelline.

In 1195 he ambushed Margaret of Geneva's escort on her way to marry Philip II of France and married her himself; in 1219 he married their daughter Beatrice to Count Ramon Berenguer IV of Provence. He granted the Aosta Valley a charter of autonomy, took Vaud, Bugey and Cavour, and routed Montferrat with Milan in 1215. He died on 1 March 1233.