From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
The Makyans (魔凶星人, Makyō-seijin; Literally meaning "Demon Evil People") are a race from Planet Makyo.
Initially, there were only a handful of Makyans. Among them were Garlic and Garlic Junior. Garlic was the notable creator of a portal to the Dead Zone. Features of Makyans varied, but their most common traits were pointed ears and fangs. They had a natural transformation which caused extreme growth of the body and an increase in strength, as seen in Dragon Ball Z: Dead Zone and during the Garlic Jr. Saga. All Makyans who appeared were evil and violent, though it is unknown if this was usual among the race.
At some point, Garlic came to Planet Earth and competed with the Nameless Namekian to become Kami of the planet. He was denied the position by the former Kami due to his evil ambitions for Earth, which eventually led to him attempting to take the position by force and being sealed up for the remainder of his life. Garlic Jr. emerged a few hundred years later and twice attempted to avenge his father by killing Kami and fufilling his father's dark dreams of ruling Earth, only to find himself trapped inside the Dead Zone both times.
The whereabouts of any other survivors of Planet Makyo's destruction is unknown.