Sir Erasmus Ommanney KCB FRS FRGS FRAS JP (22 May 1814 – 21 December 1904) was a Royal Navy officer and an Arctic explorer of the Victorian era.

[3] The captured flag of the Turkish Commander-in-Chief was handed down by seniority among the surviving officers until 1890, when Ommanney, the sole survivor of the action, presented it to King George I of Greece.

On 10 December 1835 he was promoted lieutenant, and in the same month was appointed to the transport ship HMS Cove, which was ordered to Baffin Bay to release a number of whalers caught in the ice.

Here he was employed on the coast of Morocco for the protection of British subjects during the French hostilities, which included the bombardment of Tangier by the Prince de Joinville's naval squadron.

Ommanney was promoted captain on 9 November 1846, and from 1847 to 1848 was employed under the government commission during the Irish Famine, carrying into effect relief measures and the new poor law.

In December 1851 Ommanney was appointed Deputy Controller-General of HM Coastguard, holding this position until the Crimean War of 1854, when he commissioned HMS Eurydice as senior officer of a small squadron in the White Sea, where he blockaded Archangel, stopping the coasting trade, and destroyed Russian Government property.

Ommanney's service in the Baltic was marked by his aggressive operations against Russian shore positions and gunboats, summoning defenceless towns to surrender, and his exaggerated reports of successes.

Their son Erasmus Austin Ommanney joined the Royal Navy in 1863, retired with the rank of commander in 1879, took holy orders in 1883, and was vicar of St Michael's, Southsea, from 1892 to 1911.