¹ Eduard Prokosch, A Comparative Germanic Grammar (Linguistic Society of America, Philadelphia 1939) 269, suggests that the -ss in þess originated under the influence of the -nn in the masc. acc. sg. form þann. But this influence seems more remote than that of þessa. The hypothesis that the -ss is phonetically correct (Noreen, Aisl. Gram.⁴ §280, Anm. 4; van Helten PBB 36.436, IF 26.174) is not convincing in view of the fact that -ss does not appear in the corresponding form of any other OGmc. dialect.

² The e- in endi is due to the older form endir (Goth. andeis) from which it was derived (cf. Noreen, Geschichte der nordischen Sprachen, Paul's Grundriss 3, §195, 4, Berlin 1928).

³ The -y- in gylfi is due to the older form Gylfir ‘name of a prince’ (cf. endi above).

⁴ The -y- in byrli is probably due to the derivative verb byrla ‘to pass, fill the cup’ (cf. Hjalmar Falk, Altnordische Nomina Agentis, PBB 14.37).

⁵ That the substantive skyl-i,-ja ‘prince’ escaped the influence of gylf-i,-a or of bryt-i,-a, skyt-i,-a may be due to the fact that the word skyli was restricted to poetry. Poetic words have a tendency to resist analogical phonetic changes.

⁶ Cf. e.g. bryt-a like gylf-a, but never *gylf-ja like bryt-ja; aðil-a like skapar-a, but never *skapar-ja like aðil-ja.