ἀδελφ-ιδέος · adelph-ideos — LSJ
nephew, brotherʼs son, sisterʼs son, beloved one
nephew, Alcm. 56A, etc.; usu. brotherʼs son, Hdt. 1.65, 6.94, al., Th. 2.101, etc.; also, sisterʼs son, Hdt. 4.147, Str. 10.5.6, etc.:—also ἀδελφ-ιδός, beloved one, LXX Ca. 2.3, al.