[1] Both these pairs of adverbs gloss the headword one, cognate with the adjective e)/ktopos; LSJ entry at web address 1. For the first pair see also Hesychius and other lexica. For the second pair cf. epsilon 670.
[2] Babrius 14.1; cf. alpha 3955. (On Babrius see generally beta 7.)
[3] Procopius, Secret History 1.17 (web address 2), on Antonina and Theodosius; cf. Kaldellis (6-7). See also epsilon 1422 (and, again, alpha 3955). The part of the Procopius passage which is relevant here has been omitted: it begins with e)rasqei=sa au)tou= e)kto/pws "she [Antonina] having fallen in love with him [Theodosius] extraordinarily" and continues later with e)mi/gnuto de\ au)tw=| [...] e)n parabu/stw| "she had intercourse with him in a closet." Part of this passage is quoted at kappa 587. On Antonina, wife of Belisarius (cf. beta 233), see PLRE IIIa s.v. Antonina(1). On Theodosius, adopted son of Belisarius, see PLRE IIIb s.v. Theodosius(8).
[4] Iamblichus, Babyloniaca fr. 65 Habrich.