Gautama (Sk.) The Prince of Kapilavastu, son of Sudhôdana, the Sâkya king of a small realm on the borders of Nepaul, born in the seventh century B.c., now called the “Saviour of the World”. Gautama or Gôtama was the sacerdotal* name of the Sâkya family, and Sidhârtha was Buddha’s name before he became a Buddha. Sâkya Muni, means the Saint of the Sâkya family. Born a simple mortal he rose to Buddhaship through his own personal and unaided merit. A man — verily greater than any god! (From HelenaBlavatsky.com)

Translated into English, Gautama means "Learned Person" or "Learned Guru."

* "sacerdotal" means "of priests, priestly"