Edwin Mahiʻai (Mahi) Copp Beamer (born 1928) is a tenor falsetto singer, composer and hula dancer of Hawaiian ancestry. He was born in Honolulu in the Territory of Hawaii and is the grandson of Helen Desha Beamer. His father, Milton Hoʻolulu Desha Beamer Sr. was her son. Mahi's mother was Mildred Kaaloehukaiopuaena Copp Beamer. In 2006, Mahi Beamer was inducted into the Hawaiian Music Hall of Fame.