Ancient Greek ἒ ψιλόν

← Ancient Greek εἶ (mention)

← Phoenician 𐤄‬ (borrowed)

→ English epsilon (mention)

→ English epsila (mention)

→ Greek έψιλον (inherited)

→ Hungarian epszilon (derived)

→ Japanese エプシロン (learned borrowing)

→ Russian эпсилон (borrowed)