αδελφιδεύς
From LSJ
ὀρχούμενός τις καὶ τὴν τοῦ Κρόνου τεκνοφαγίαν παρωρχεῖτο → a dancer was presenting Kronos who devoured his children, an actor portrayed Kronos who devoured his children
ἀδελφιδεὺς (-έως), ο (Α)
γιος αδελφού ή αδελφής, ανιψιός, ο αδελφιδούς.
[ΕΤΥΜΟΛΟΓΙΑ < ἀδελφός + -ιδεύς].