Usage: 2 forms in 6 verses
Form Translated As     In Verse(s)
σειρήνων of sirens LXX.Job.30.29LXX.Isa.34.13LXX.Jer.50.39LXX.Mic.1.8
σειρήνεσ sirens LXX.Isa.13.21LXX.Isa.43.20

Liddell-Scott-Jones

Σειρήν (Seirēn) a siren G:N-N

Σειρήν, ῆνος, ,

“Siren”; in plural, Σειρῆνες, αἱ, [Σειρήνοιιν [prev. work] 52, 167 ">Refs 8th c.BC+]; πτεροφόροι νεανίδες.. Σειρῆνες [Refs 8th c.BC+]

__II metaphorically, Siren, deceitful woman, [Refs 5th c.BC+]: also, the Siren charm of eloquence, persuasion, and the like, [Refs 7th c.BC+]; ποικίλη σ., of philosophy, [Refs 5th c.BC+]
__III , a kind of solitary bee or wasp, [Refs 4th c.BC+]
__IV a small singingbird, [Refs 5th c.AD+]
__IV.2 probably ostrich, [LXX]
__V as name of Zeus, uncertain in [Refs 5th c.BC+] accusative singular, codices [Refs]
__VI a light garment, [Refs 1st c.AD+], as name of a ship, [Refs]

LSJ Scripture Refs: LXX.Isa.13.21