Consciousness in the seed as David, it was from house of Judah after the reconciliation of the Ruth, which witness the purity in most morality than the issue of Tamar towards Judah as reversion.
Then Gilonites are Descended from Amorites possessed with Mesopotamia (eastern Semitic consciousness, as well as some blended Greek sea consciousnesses after jushua (due to collapse of Mycenaean Greek and its immigration to agaric and Other Mediterranean eastern coast) which might settled in the tribe in assumption. Hence David king from judah might not only observe the purity from Ruth, as well as the blended Ancient Greek and Babylonian/Mesopotamia as feminine principle.