By his marriage to Maria Lakapena (renamed Eirene), Peter I had several children, including: Plenimir Boris II, who succeeded as emperor of Bulgaria in 969 Roman, who succeeded as emperor of Bulgaria in 977 Notes References Jordan Andreev, Ivan Lazarov, Plamen Pavlov, Koj koj e v srednovekovna Bălgarija, Sofia 1999. 10th-century births 970 deaths 10th-century Bulgarian emperors 10th-century Christian saints 10th-century rulers in Europe Christian monarchs Christian royal saints Medieval Bulgarian saints Krum's dynasty Sons of emperors