Sigeberht II, nicknamed the Good (Bonus) or the Blessed (Sanctus),[1] was King of the East Saxons (r. c. 653 to ? 660 x 661), in succession to his relative Sigeberht I the Little. Although a bishopric in Essex had been created under Mellitus, the kingdom had lapsed to paganism and it was in Sigeberht's reign that a systematic (re-)conversion of the East Saxons took root. Bede's Historia Ecclesiastica, Book III, chapter 22, is virtually the sole source for his career.