Research Notes:

The Annales Xantenses name "Begga" as the second daughter of Pépin and record her marriage with "Anchisus dux egregius filius Arnulfi epicopi Mettensium". Her position in this source as junior to her sister Gertrudis may be due to the latter’s standing as a religious figure. The Vita Beggæ (dated to [1080/90]) names “duarum filiarum...unam...Beggam, alteram...Gertrudem” as the children of “Dux Pipinus Regni Francorum” and his wife “Yduberga”. Sigebert's late 11th century Chronica records in 649 that "Ansigisus filius sancti Arnulfi" had married “Begga soror Grimoaldi”. Settipani highlights that other events in the same paragraph of Sigebert can be dated to [643/44], but also that Werner has dated the marriage to [630/40] (Settipani adds “sans bonne raison à notre sens”). Both estimates appear to be little more than guesswork. Sigeberto's Vita Landiberto episcopi Traiectensis names "Pippinus…principes Francorum…sanctæ Beggæ matris eius".

The Vita Beggæ (dated to [1080/90]) records that Begga retired to “monasterio germanæ suæ Gertrudis”. This event can be dated to [689/97] if it is correct, as reported by Ghesquière, that a biography of St Gertrude records that Begga retired to her monastery 33 years after her sister died (her death is recorded variously between [656/64]).

The Annales Xantenses record the death in 698 of "Sancta Begga mater Pippini ducis". The Annales Laubienses record the death in 709 of “Begga sanctæ Gertrudis germana”. ¹