First Sea Lord and First Lord of the Admiralty are both fantastic and very real titles, with long histories, along with Lord High Admiral of the United Kingdom,

First Sea Lord and First Lord of the Admiralty are both fantastic and very real titles, with long histories, along with Lord High Admiral of the United Kingdom, which is a bit harder to get. https://en.wikipedia.org/wiki/First_Lord_of_the_Admiralty https://en.wikipedia.org/wiki/First_Lord_of_the_Admiralty https://en.wikipedia.org/wiki/First_Sea_Lord_and_Chief_of_the_Naval_Staff https://en.wikipedia.org/wiki/First_Sea_Lord_and_Chief_of_th... https://en.wikipedia.org/wiki/Lord_High_Admiral_of_the_United_Kingdom https://en.wikipedia.org/wiki/Lord_High_Admiral_of_the_Unite...