Transliteration of Greek Words in the ESV Study Bible

Letter	Name of Letter	Transliteration
α	alpha	a
β	bēta	b
γ	gamma	g
γ	gamma nasal	n (before g, k, x, c)
δ	delta	d
ε	epsilon	e
ζ	zēta	z
η	ēta	ē
θ	thēta	th
ι	iōta	i
κ	kappa	k
λ	lambda	l
μ	mu	m
ν	nu	n
ξ	xi	x
ο	omicron	o
π	pi	p
ρ	rho	r
ρ̒	initial rho	rh (or in medial double rho)
σ, ς	sigma, final sigma	s
τ	tau	t
υ	upsilon	y (not in diphthong)
υ	upsilon	u (in diphthongs: au, eu, ēu, ou, ui)
φ	phi	ph
χ	chi	ch
ψ	psi	ps
ω	ōmega	ō
‘	rough breathing mark	h (preceding initial vowel)