diogo veloso, or diego belloso in the spanish historical accounts, (amarante 1558 - cambodja 1599) was a portuguese adventurer active in southeast asia in the last quarter of 16th century, acting sometimes in the service of the spanish governor of the spanish east indies (within the cambodian–spanish war) and sometimes as a free-lancer. he and spanish blas ruiz were the first europeans to ever set foot in laos.