Boyd’s Bible Dictionary:

“Alpha” From Concise Bible Dictionary:

“A א (Aleph)” From Concise Bible Dictionary:

Aleph is the first letter in the Hebrew alphabet. In numerals it stands for 1, and with two points, א, 1,000. A (alpha) the first letter in the Greek alphabet. The small letter with a dash after (α´), stands for 1. (For this letter as a name of Christ see ALPHA.)

Strong’s Dictionary of Greek Words:

of Hebrew origin; the first letter of the alphabet; figuratively, only (from its use as a numeral) the first: --Alpha. Often used (usually ἄν, before a vowel) also in composition (as a contraction from 427) in the sense of privation; so, in many words, beginning with this letter; occasionally in the sense of union (as a contraction of 260).

Jackson’s Dictionary of Scripture Proper Names:

first letter of the Greek alphabet: beginning