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ὧν

Γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ → The fool laughs even when there's nothing to laugh at
Menander

French (Bailly abrégé)

gén. pl. du relat. ὅς, ἥ, ὅ.

Russian (Dvoretsky)

ὧν: gen. pl. к ὅς, ἥ, ὅ.