THEODO IV Duke of Bavaria. The Annales Ducum Bavariæ name (in order) "Theodo…Theodo [et] Theodebertum" as Dukes of Bavaria, this being the second Theodo. The mid-13th century Series Ducum Bavariæ lists, in order, the dukes from 514 as Theodo "dux primus", Theodo II, "Garibaldus rex", Tassilo [I] dux, Theodo III "quem sanctus Ruodbertus baptizavit", Theodebertus, Theodo IV "qui cum filiis sanctum Corbiniacum locavit Frisinge"… 1