The Watchtower and other Unitarians use scriptures that say that all things were "through" Jesus Christ in order to reduce him to being less than God. They reason that since all things are "of" the Father and "through" the Son that therefore the Son is not also Jehovah with the Father. Those who believe in the Deity of Jesus believe that both the Father and the Son are Jehovah (though different persons within the one Jehovah). Accordingly all things are "of" and "through" Jehovah.
The Bible teaches that all things are of and through Jehovah.
"For who hath known the mind of the Lord? or who hath been his counsellor? or who hath first given to him, and it shall be recompensed unto him again? For of him, and through him, and unto him, are all things. To him `be' the glory for ever. Amen." Romans 11:34-36
Comment: all things are "of" the Lord (Jehovah see NWT) and "through" the Lord (Jehovah).
1 Corinthians 8:6 yet to us there is one God, the Father, of whom are all things, and we unto him; and one Lord, Jesus Christ, through whom are all things, and we through him.
Comment: all things are "of" the Father and "through" the Son.
Conclusion: Since Romans 11:36 teaches that all things are "of" and "through" Jehovah, and since 1 Corinthians 8:6 teaches that all things are "of" the Father and "through" the Son, then both the Father and the Son must together be the Lord (Jehovah) of Romans 11:36. Note the word"through" in Romans 11:36 and the word "through" in 1 Corinthians 8:6 are the same Greek word.
If the Father and the Son are together Jehovah then this would mean that Jehovah alone is the creator of all things. This agrees with the Old Testament:
"That alone stretcheth out the heavens, And treadeth upon the waves of the sea;" Job 9:8 ASV
"Thus saith Jehovah, thy Redeemer, and he that formed thee from the womb: I am Jehovah, that maketh all things; that stretcheth forth the heavens alone; that spreadeth abroad the earth (who is with me?);" Isaiah 44:24 ASV