[1] The headword eu)ktai=on [not showing in the SOL] has the same glossing, variously, in other lexica and must be quoted from somewhere. As glossed, it is neuter nominative/accusative singular (rather than masculine accusative singular) of this adjective. For its opposite see alpha 3095.
[2] Tentatively attributed by Adler to Iamblichus; now Iamblichus, Babyloniaca fr. 43 Habrich.
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NB this is Adler's epsilon 3549a. Here, faute de mieux, is 3549b:
*eu)kth/monos: plousi/ou.
Of a wealthy [man]: [meaning] of a rich [one].
The headword -- here in the genitive case and so evidently quoted from somewhere -- is best attested as a proper name, Euktemon, but for the adjectival sense see e.g. Pindar, Nemeans 7.92.