Foundling (Earth-2356)

Foundling is a term used to describe a type of Mandalorian who was not born Mandalorian, but adopted into their culture. The bounty hunter Tenzo was once a foundling after an attack by the Confederacy of Independent Systems when he was a young boy left him orphaned. During the Imperial Era, Tenzo obtained beskar as a down payment from an Imperial remnant. He gave the beskar piece to Yukimi who forged it into a pauldron, with the excess meaning to sponsor foundlings.

Source

 * https://starwars.fandom.com/wiki/Foundling