Adam Clarke on Judges 13:24

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.