HMS Madagascar (1822)
 HMS Madagascar was a 46-gun fifth-rate Seringapatam-class frigate built at Bombay and launched on 15 November 1822.The Bavarian Prince Otto who had been selected as the King of Greece was delivered to his new capital Nafplion in 1833.In 1843 HMS Madagascar is recorded as calling at Ascension Island accompanied by the steamer Albert being outfitted for suppression of the slave trade.The ship was made a storeship and was anchored at Rio De Janeiro after 1853 and was eventually sold in 1863.