Usage: 6 forms in 35 verses
Form Translated As     In Verse(s)
αδελφιδώ my beloved LXX.Song.5.6LXX.Song.6.3LXX.Song.7.9LXX.Song.7.10
to my beloved LXX.Song.5.5
αδελφιδόσ My beloved LXX.Song.1.13LXX.Song.1.14LXX.Song.1.16LXX.Song.2.3LXX.Song.2.9LXX.Song.2.10LXX.Song.2.16LXX.Song.5.1LXX.Song.5.4LXX.Song.5.6LXX.Song.5.10LXX.Song.5.16LXX.Song.6.2LXX.Song.6.3
your beloved LXX.Song.5.9LXX.Song.5.9LXX.Song.6.1LXX.Song.6.1
αδελφιδόν her beloved LXX.Song.8.5
my beloved LXX.Song.5.8
αδελφιδού a beloved LXX.Song.5.9LXX.Song.5.9
of my beloved LXX.Song.2.8LXX.Song.5.2
αδελφιδοί beloved men LXX.Song.5.1
αδελφιδέ O my beloved LXX.Song.2.17LXX.Song.7.11LXX.Song.7.13LXX.Song.8.1LXX.Song.8.14

Liddell-Scott-Jones

ἀδελφιδός (adelphidos) a kinsman G:N-M

Included with: ἀδελφιδός-ιδέος,

contraction -οῦς, , nephew, [Refs 7th c.BC+], etc.; usually brother's son, [Refs 5th c.BC+]; also, sister's son, [Refs 5th c.BC+]:—also ἀδελφιδός-ιδός, beloved one, [LXX]

LSJ Scripture Refs: LXX.Song.2.3