Lord High Admiral was the rank held by the Commander-in-Chief of the military of the Galactic Kingdom, roughly 41,000 years before the Battle of Yavin.
The title was later used by Blitzer Harrsk, a former admiral of the Imperial Navy, in 4 ABY, after becoming the warlord of Zero Command.
The title was also bestowed upon Artis Whentzer By Emperor Palpatine 1 ABY