Matthew 1:1 - Geneology of Jesus

I find the geneologies in the bible to be interesting because even in a brief list, certain important things seem to show up. You'll notice certain person's mothers were include -- we see Rahab and Ruth among the list of mothers. There is one that I don't know -- Tamar. Does anyone know who she is?

You also find all of Jesus's names here - Lion of Judah, seed of Jesse, Son of David. Are there names that I am forgetting?

We also see that Matthew didn't forget to mention that Solomon was born from the wife of Uriah. God's grace that through David's biggest sin and weakness came his wise son and his decendant, the messiah. For those who love him, God is able to transform their weakness for His purpose. David loved God. God took his weakness and used it. Matthew reminds us of this. It's not how great David was that Jesus took his name. But it was God's grace and his relationship with David.

Next we notice the mathmatical precision of the geneology. 14, 14 and 14. God likes numbers, 3, 7 as examples. Three is the most structurally solid. Seven has deep meaning to jews as being:

"The seventh is then the middle point, a thing of zero dimensions, and untouchable. Present but intangible. It therefore represents the holiness which is inherent in the universe. Thus, the physical world was created in six days, and imbued with sanctity on the seventh, the Shabbos." More

Is 14 significant because it is a multiple of 7? Why is it important to know that there were exactly 14 generations? What does that say -- is it foretold?