[4] kváðu ‘said’: 721, 1032ˣ and 399a-bˣ have ‘kvóðu’. The verb kveða belongs to the 5th class of verbs with the ablaut pattern e-a-á-e . The change vá > vó began in C14th (Stefán Karlsson 2000, 26; Björn K. Þórólfsson 1925, xi-xii). Since the other verbs of the 5th class do not have -v-, the vá > vó change in kvóðu was reversed back to kváðu to fit with the ablaut pattern of the 5th class. This change had not been reversed when 721 was written shortly after 1500. The scribes of 1032ˣ and 399a-bˣ follow the spelling of 721, but the scribe of 2166ˣ chose the reversed form, kváðu.