Question: Who is Gisela, Abbess Of Chelles's paternal grandfather?
Sentence (from "Wendreda"): She was uncertainly reported as a daughter of King Anna of East Anglia, a Christian king, which would make her a sister of Etheldreda, abbess of Ely, Sexburgha, abbess of Minster- in- Sheppey, and Ethelburga, abbess of Faremoutiers, who are all better- known saints, and a half- sister of Sæthryth, also an abbess of Faremoutiers.
Relevant evidence: No