Ἰοῖ Ἰώ, Io Morpho works with a static database. If you like, you can compare the output of Morpheus.Parsed as: Proper-name noun feminine dative singular ✓ Proper-name noun feminine vocative singular of Ἰώ Ἰώ Feminine SingularDualPlural Nominative Ἰὼ – – Genitive Ἰοῦς – – Dative – – – Accusative Ἰοῦν, Ἰώ, Ἰὼ – – Vocative Ἰοῖ – –