32. Tubba was the title of the kings of the Himyarites, like the titles of Khosroes, Caesar, Pharaoh etc. which have been associated with the kings of different countries. They were a branch of the Sabaeans, who attained domination over Saba in 115 B.C. and ruled it until 300 A.D. They have been a well known people of Arabia for centuries. (For details, see (E.N. 37 of Surah Saba).