HMY Iolaire was an iron-hulled steam yacht that was launched in Scotland in 1881 as Iolanthe. She was renamed Mione in 1898; Iolanthe in 1900; and Amalthæa in 1907. Between 1881 and 1915 a succession of industrialists and aristocrats had owned the yacht. She was commissioned into the Royal Navy in 1915 as HMY Amalthaea, and renamed HMY Iolaire in 1918. She was wrecked in a storm at the mouth of Stornoway harbour on New Year's Day 1919. The disaster killed more than 200 people, including many of the young men of the isles of Lewis and Harris. UK law now protects her wreck as a war grave.