Stephanos of Byzantium - Ethnika
Oikos: Herodianos derives it from 'eiko', ‘to withdraw’, since it is that into which we withdraw. It may also mean one’s private dwelling, deriving from 'oion', ‘I leave it alone’, since one is alone, with the addition of κ, as 'horkos' is from 'horos'. The inhabitant is 'oikeios', just as 'asteios' is from 'astos'; and 'oikeus' is from 'oikos'. 'Oikia' and 'oikiates' are formed with the addition of α from 'oikites'.
Stephanos excerpt (left) is aligned with matched Herodian passages (right). Colors indicate corresponding overlap spans.
…παρὰ τὸ εἴκω, ἐν ᾧ εἴκομεν. δύναται δὲ εἶναι τὸ ἴδιον ἐνδιαίτημα παρὰ τὸ οἶον τὸ μόνον ἐῶ μονούμενος, κατὰ πλεονασμὸν τοῦ « κ », ὡς ὅρος ὅρκος. ὁ οἰκήτωρ οἰκεῖος, ὡς ἀστός ἀστεῖος, καὶ οἰκεύς παρὰ τὸ οἶκος, οἰκία καὶ οἰκιάτης κατὰ πλεονασμὸν τοῦ « α » ἀπὸ τοῦ οἰκίτης.
…, Βαιάτης, Ἐλεάτης, Τεγεάτης, Μαλεάτης. Ἀνδροτίων πέμπτῳ. Γυθεάτης, Σερρεάτης, Φενεάτης, Πανεάτης, Κορσεάτης, Ὑδρεάτης, Ὀρνεάτης, Ζελειάτης, Κορωνειάτης, Καυλωνειάτης, Ἐρευάτης πόλις Λυκίας καὶ τὸ ἐθνικὸν ὁμοφώνως. Σπαρτιάτης κατὰ πλεονασμὸν τοῦ 'α' ἀπὸ τοῦ Σπαρτίτης ὡς Κροτωνιάτης, Φαριάτης, Φασιάτης, Νωνακριάτης, οἰκιάτης. Ἰάτης, Σκιάτης, Ἐρινιάτης κώμη Μεγαρίδος. Παυσανίας αʹ (c. 44, 5) καὶ ὁ οἰκήτωρ Ἐρινιάτης διὰ τὸ προκατειληφός. Βρενθιάτης ποταμὸς Ἀρκαδίας. Αὐταριάτη…