From Old Norse mjolka, from Proto-Germanic *melukōną (“to milk, to give milk”), cognate with Norwegian mjölka, Swedish mjölka, English milk. Old Danish molkæ and Old Norse molka go back to a different form, *mulkōną. Germanic also had a strong verb, *melkaną (“to milk”), surviving in Dutch melken and German melken. All these words are derived from Proto-Indo-European *h₂melǵ- (“to milk”), which is also the source of Latin mulgeō, Ancient Greek ἀμέλγω (amélgō), and the Germanic words for "milk", cf. Danish mælk.