What does Levi mean?
From the Hebrew verb lawah, 'to join, attach, accompany.' Genesis 29:34 explains the name by Leah's hope that her husband will now be 'joined' to her — a biblical folk etymology, but one that rests on the genuine root l-w-h.
What does Asher mean?
From the Hebrew root a-sh-r and the noun osher, 'happiness, good fortune, blessedness.' In Genesis 30:13 the name is introduced with Leah's exclamation 'Happy am I!' (be'oshri) — a biblical wordplay, though the link to the root 'to be happy/fortunate' is also sound linguistically.