ṭyb / Semitic roots

a. mazel tov, from Late Hebrew mazzāl ṭôb, good luck, from ṭôb, good, from ṭôb, to be(come) good;;

b. Tobit, from Hebrew ṭôbīyāh, my good (is) Yahweh, from ṭôbī, my good (yāh, Yahweh; see hwy).