Jamieson, Fausset and Brown on Genesis 29:32-35

32-35. son ... his name Reuben--Names were also significant; and those which Leah gave to her sons were expressive of her varying feelings of thankfulness or joy, or allusive to circumstances in the history of the family. There was piety and wisdom in attaching a signification to names, as it tended to keep the bearer in remembrance of his duty and the claims of God.