On 3 March 1857, he died and was buried with full military honours. His grave is currently located in the Recoleta cemetery in Buenos Aires.
Since the mid-1980s, a replica of Brown's sword has been worn by Admirals of the Argentine Navy.
One such replica is on display in @NMMIreland.
In 2006, Bertie Ahern unveiled a new statue of Brown on Admiral Brown Way, Sir John Rogerson's Quay, Dublin (Photo: @wikicommons CC BY-SA 2.0 William Murphy)
In 1982, @WolfeTones composed/performed a tribute song: "Admiral William Brown".
Since 2012, rugby int'ls between 🇦🇷 and 🇮🇪 compete for Admiral Brown Cup.