Koa is a unisex Hawaiian baby name and the name of a tree that grows on the islands. The tree itself - acacia koa, is more closely related to peas than trees and is the biggest tree on the Hawaiian islands. The wood is used for all sorts of things and is absolutely beautiful on a finished product, and one of the most traditional uses was for canoes. Koa, pronounced KO-ah, means "strong, brave."
Koa Thomas is a son of Tom Dumont from the band 'No Doubt.' Irish pop star Kian Egan also has a son named KoaKoa Smith is a competitive surfer in Hawaii.
Sometimes Koa is part of a longer Hawaiian name, such as Kekoa or Nakoa. Koa had been used in the U.S. since at least 1978 but probably much longer in Hawaii. At first it was hardly used, but after 2000 it really jumped in usage for boys - from 17 boys and 10 girls in 2000 to 107 boys and 11 girls in 2013. It is still considered rare.