Strong’s G1 · Greek

Α

A · al'-fah

Origin of Hebrew origin;

Meaning the first letter of the alphabet; figuratively, only (from its use as a numeral) the first:

In the King James Version --Alpha. Often used (usually ἄν, before a vowel) also in composition (as a contraction from ἄνευ (G427)) in the sense of privation; so, in many words, beginning with this letter; occasionally in the sense of union (as a contraction of ἅμα (G260)).

In 4 verses of the King James Version

Revelation 1:8I am Alpha and Omega, the beginning and the ending, saith the Lord, which is, and which was, and which is to come, the Almighty.
Revelation 1:11Saying, I am Alpha and Omega, the first and the last: and, What thou seest, write in a book, and send it unto the seven churches which are in Asia; unto Ephesus, and unto Smyrna, and unto Pergamos, and unto Thyatira, and unto Sardis, and unto Philadelphia, and unto Laodicea.
Revelation 21:6And he said unto me, It is done. I am Alpha and Omega, the beginning and the end. I will give unto him that is athirst of the fountain of the water of life freely.
Revelation 22:13I am Alpha and Omega, the beginning and the end, the first and the last.

From James Strong’s Exhaustive Concordance of the Bible (1890): its Greek dictionary in the edition of Ulrik Petersen, its Hebrew and Chaldee dictionary in that of David Troidl and David Instone-Brewer; the King James words numbered as in the edition the site sets the King James Version from. Public domain.