Verse 34. - And she conceived again (say, in the third year of her marriage), and bare a son; and said, Now this time will my husband be joined unto me, - לָוָה, to join, is the root from which comes לֵוִי. (Levi), her son's name - because I have borne him three sons: therefore was his name called Levi - Associated, or Joined.
29:31-35 The names Leah gave her children, expressed her respect and regard, both to God and to her husband. Reuben, or See a son, with this thought, Now will my husband love me; Levi, or joined, expecting, Now will my husband be joined unto me. Mutual affection is both the duty and comfort of the married relation; and yoke-fellows should study to recommend themselves to each other, 1Co 7:33,34. She thankfully acknowledges the kind providence of God in hearing her. Whatever supports and comforts us under afflictions, or tends to our deliverance from them, God must be owned in it. Her fourth son she called Judah, or praise, saying, Now will I praise the Lord. This was he, of whom, as concerning the flesh, Christ came. Whatever is the matter of our rejoicing, ought to be the matter of our thanksgiving. Fresh favours should quicken us to praise God for former favours; Now will I praise the Lord more and better than I have done. All our praises must centre in Christ, both as the matter of them, and as the Mediator of them. He descended after the flesh from him whose name was Praise, and He is our praise. Is Christ formed in my heart? Now will I praise the Lord.
and said, now this time will my husband be joined to me; in greater affection and stronger ties of love, and cleave unto her:
because I have born him three sons; which she considered as a threefold cord, binding his affections to her, which could not be easily broke:
and therefore was his name called Levi; which signifies "joined"; from him the Levites sprung, and had their name.