Definitions of alpha:

• noun:   the 1st letter of the Greek alphabet
• noun:   the beginning of a series or sequence

  Example: "The Alpha and Omega, the first and the last, the beginning and the end--Revelations"

• adjective:   first in order of importance

  Example: "The alpha male in the group of chimpanzees"

• adjective:   early testing stage of a software or hardware product

  Example: "Alpha version"

• name:  A female given name (rare: 1 in 20000 females; popularity rank in the U.S.: #1317)
• name:  A surname (very rare: popularity rank in the U.S.: #66080)