Samson - The etymology is doubtful. Perhaps it comes from a word signifying "to minister," in allusion to his Nazaritic consecration to the service of God.

And called his name Samson - The original שמשון shimshon, which is from the root שמש shamash, to serve, (whence shemesh, the sun), probably means either a little sun, or a little servant; and this latter is so likely a name to be imposed on an only son, by maternal fondness, that it leaves but little doubt of the propriety of the etymology.
And the Lord blessed him - Gave evident proofs that the child was under the peculiar protection of the Most High; causing him to increase daily in stature and extraordinary strength.

And the woman bare a son, and called name Samson,.... After these appearances were over, Manoah and his wife returned to their habitation, and she soon became pregnant, and at the usual course of time brought forth a son, and she gave him the name of Samson; for what reason it is not easy to determine. Josephus says (s) the word signifies "strong"; perhaps he was born a strong robust child, which is not unlikely, or the woman might have some prophetic hint of his future strength, and so gave him this name; but the word has not the signification of strength in it; it rather signifies the sun, which is indeed a strong body, and is compared to a strong man running his race, and so a strong man may be compared to that; but rather, with respect to the sun, this name might be given him, because of the splendour of his countenance with which he might be born, or in memory of the shining countenance of the angel which brought the tidings of his birth, or because he was to be the instrument of dispelling the darkness of calamity and distress Israel were now in: but the word more properly signifies a minister or servant, from whence the sun has its name; for Samson was to be, and was, a minister and servant of God, and of his people Israel. There is an agreement between the type and the antitype in this name in either sense. Christ is the mighty God, and mighty Saviour, the sun of righteousness, the light of the world, and the deliverer of his people from darkness of calamity and distress; and who came not to be ministered unto, but to minister and perform the great service of redemption and salvation:
and the child grew in bodily strength and stature, and grew up to man's estate, Luke 2:40.
and the Lord blessed him; not only with extraordinary strength of body, but with great endowments of mind, with the Spirit and graces of the Spirit; with grace, and blessings of it, and with his gracious presence; with this compare Psalm 21:3.
(s) Ut supra, (Antiqu. l. 5. c. 8.) sect. 4.

The Spirit of the Lord began to move Samson when a youth. This was evidence that the Lord blessed him. Where God gives his blessing, he gives his Spirit to qualify for the blessing. Those are blessed indeed in whom the Spirit of grace begins to work in the days of their childhood. Samson drank no wine or strong drink, yet excelled in strength and courage, for he had the Spirit of God moving him; therefore be not drunk with wine, but be filled with the Spirit.

SAMSON BORN. (Judges 13:24-25)
the woman bare a son, and called his name Samson--The birth of this child of promise, and the report of the important national services he was to render, must, from the first, have made him an object of peculiar interest and careful instruction.

The promise of God was fulfilled. the boy whom the woman bare received the name of Samson. שׁמשׁון (lxx, Σαμψών) does not mean sun-like, hero of the sun, from שׁמשׁ (the sun), but, as Josephus explains it (Ant. v. 8, 4), ἰσχυρός, the strong or daring one, from שׁמשׁום, from the intensive from שׁמשׁם, from שׁמם, in its original sense to be strong or daring, not "to devastate." שׁדד is an analogous word: lit. to be powerful, then to act powerfully, to devastate. The boy grew under the blessing of God (see 1-Samuel 2:21).

Blessed him - That is, endowed him with all those graces and gifts of mind and body which were necessary for the work he was designed for.