Augusto Dias was one of the Madieran Cabinet Makers that came to Hawaii on the Ravenscraig and have been credited along with Manuel Nunes, Jose do Espirito Santo and Joao Fernandes, (he was the player, not one of the Makers), with "Inventing the Ukulele. 

He was the first the records show to have his own Guitar shop in 1884, but it burned down in 1900 and he didn't open again until 1904. He retired from Luthiery in 1910 and died in 1915. 

His Ukuleles are considered the rarest of the early makers and he was also the favourite maker of King David Kalakaua. He did make the 2 Ukuleles that are know to have belonged to the King and was apparently allowed to put the royal seal of Hawaii on his Ukuleles, (however none with the royal seal on are known to exist today).