Usage: 4 forms in 113 verses
Form Translated As     In Verse(s)
ότι αλλ η ότι αλλ η but only LXX.2Sam.24.24
αλλ΄ η But if LXX.Num.16.30
Only LXX.Num.13.28LXX.Num.18.15LXX.Num.26.33LXX.1Sam.21.4LXX.1Sam.30.17LXX.2Sam.13.33LXX.2Kgs.4.2LXX.2Kgs.10.23LXX.2Kgs.17.36LXX.2Kgs.17.39LXX.2Kgs.23.23LXX.Ezek.44.10
but LXX.Exod.16.8LXX.Deut.4.26LXX.Deut.12.5LXX.Deut.12.15LXX.Deut.29.20LXX.1Sam.8.19LXX.1Sam.30.22LXX.1Kgs.8.19LXX.1Kgs.18.18LXX.1Kgs.22.31LXX.2Chr.18.30LXX.2Chr.19.3LXX.2Chr.19.6LXX.2Chr.20.15LXX.2Chr.29.34LXX.Esth.5.12LXX.Job.14.22LXX.Ps.1.2LXX.Ps.1.4LXX.Isa.42.19LXX.Isa.42.19LXX.Jer.19.6LXX.Jer.31.30LXX.Dan.10.7LXX.Dan.10.21LXX.Hos.1.6LXX.Zech.8.12
but instead LXX.Jer.20.3
but only LXX.Gen.21.26LXX.Gen.24.4LXX.Gen.47.18LXX.Lev.21.2LXX.Lev.21.14LXX.Num.14.23LXX.Num.14.30LXX.Num.23.13LXX.Num.31.23LXX.Deut.4.12LXX.Deut.5.3LXX.Deut.10.12LXX.Deut.12.14LXX.Deut.12.18LXX.Deut.16.6LXX.Josh.14.4LXX.Judg.15.13LXX.1Sam.8.7LXX.1Sam.10.19LXX.1Sam.12.12LXX.1Sam.18.25LXX.1Sam.21.6LXX.2Sam.12.3LXX.2Sam.13.32LXX.1Kgs.17.12LXX.1Kgs.21.29LXX.1Kgs.22.8LXX.1Kgs.22.18LXX.2Kgs.5.15LXX.2Kgs.5.17LXX.2Kgs.7.10LXX.2Kgs.13.7LXX.2Kgs.14.6LXX.2Kgs.17.40LXX.2Kgs.19.18LXX.1Chr.2.34LXX.1Chr.21.24LXX.1Chr.23.22LXX.1Chr.29.1LXX.2Chr.18.17LXX.2Chr.25.4LXX.2Chr.26.18LXX.2Chr.28.22LXX.Job.4.16LXX.Ps.115.1LXX.Isa.66.2LXX.Jer.7.23LXX.Jer.26.15LXX.Jer.38.4LXX.Jer.38.6LXX.Ezek.39.10LXX.Ezek.44.22LXX.Ezek.44.25LXX.Hos.7.14LXX.Mic.6.8
except LXX.1Chr.15.2LXX.2Chr.2.6LXX.2Chr.21.17LXX.Dan.3.28LXX.Dan.6.7LXX.Dan.6.12LXX.Dan.10.21
if he is not LXX.Job.6.5
none other than LXX.Gen.28.17LXX.1Sam.16.6LXX.Ps.133.1
other than LXX.Judg.7.14
unless LXX.Exod.33.16
αλλ΄ but only LXX.2Chr.35.21
αλλ η but only LXX.2Sam.19.28LXX.2Kgs.9.35

Liddell-Scott-Jones

ἀλλ᾽ ἢ (all᾽ ē) but only G:CONJ
combination of: (ἀλλά+)

ἀλλ᾽ ,,

={ἀλλά} 1.3, except, but, after negatives, especially οὐδείς or μηδείς, which are often joined with ἄλλος or ἕτερος, as οὐδεὶς ἀλλ᾽ ἐκείνη no one except her, [Refs 5th c.BC+]; ἀργύριον μὲν οὐκ ἔχω ἀλλ᾽ μικρόν τι[Refs 5th c.BC+]:—after questions implying a negative, [ἀλλ᾽ ἢ (bis). (This form seems to arise from a confusion of οὐδὲν ἄλλο ἤ">Refs 5th c.BC+] other than, except,[Refs 5th c.BC+] except that.., and οὐδὲν ἄλλο.. ἀλά.)