Lieutenant Admiral is a senior naval military rank in some countries of the world. The rank is considered by many nations to be a direct equivalent of a Vice-Admiral.
In the Navy Royal the title was used in the Kingdom of England as early as the late fourteenth century with the appointments of the Lieutenant Admiral of the North from 1362 and the Lieutenant Admiral of the West from 1381 who were both deputies of the Admiral of the North and Admiral of the West. In 1397 the more senior office of Lieutenant of the Admiralty was created who was the deputy of the High Admiral of England
In the Royal Netherlands Navy the rank of lieutenant admiral (Dutch: luitenant-admiraal) is senior to vice admiral (Dutch: vice-admiraal) and equivalent to admiral in most other navies. The rank of admiral is reserved for a prince of the house of Oranje-Nassau or the king.
During the seventeenth century, Michiel de Ruyter and Cornelis Tromp, had the rank of lieutenant admiral general (Dutch: luitenant-admiraal-generaal) to distinguish them from other naval officers with the rank lieutenant admiral.