'Commencement' in the Bible

it has seemed right to me also, after careful investigation of the facts from their commencement, to write for you, most noble Theophilus, a connected account,

The child continued to grow and to become strong in spirit, and he lived in the deserts until the day of his public appearance to Israel [as John the Baptist, the forerunner of the Messiah].

My manner of life then from my youth, which from its commencement was passed among my nation in Jerusalem, know all the Jews,

For He saved us and called us with a holy call, not in accordance with our desserts, but in accordance with His own purpose and the free grace which He bestowed on us in Christ Jesus before the commencement of the Ages,

in hope of the Life of the Ages which God, who is never false to His word, promised before the commencement of the Ages.

how shall we escape if we have been negligent of so great salvation, which, having had its commencement in being spoken of by the Lord, has been confirmed to us by those who have heard;