Same entry, according to Adler, in the Ambrosian Lexicon.
The headword is an Ionicized form of the Doric i)/sami attested in (e.g.) Epicharmus fr. 254 Kaibel (now 280 Kassel-Austin) and Pindar Pythian 4.248 (web address 1). The forms with stem i)sa- were created by analogy with third person plural i)/sasi; cf. iota 611, and see Smyth §794D3 (web address 2). For the gloss cf. iota 611, iota 615, iota 637, iota 680, iota 681, iota 702.