In all the world, เพ็ญพันธุ์ (เพ็ญพันธุ์ 
) is a very rare principally feminine, but very infrequently male given name. The forename เพ็ญพันธุ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare predominantly feminine, but very infrequently boy's name. Also, เพ็ญพันธุ์ is the last name as well as the forename.