Be very careful if you make a vow to Yahawah. It would be better to be quiet.

Follow not the ways of the heathen.

How could the tribe of Benjamin still exist if the nationality of the woman mattered?

You are who your father is, whatever his nationality is that is your nationality. It does not matter who your mother is, the seed comes from the father. The mother is the soil or incubator. This is not to diminish the important roll of the woman, but to correct false doctrine.