Girl's father not happy with the boy

Q: One of my distant relatives, we both like each other and want marry. My parents are ready for the relation, however the girls father is not ready to make this relation with us. The girl and I want to marry.

1. Is it right if we do nikaah with shari witnesses without her parent's permission (she is underage according to India's rule i.e. girl is 18 or above years old.)

2. Can we do nikaah and live separate from each other until she turns 18 years?

3. Once she is 18 years of age, can we marry through court registrar?

Girls names

Q: Allah Ta'ala blessed me with a daughter. I want to keep her name Aiza, Ansharah or Adeena. Can I keep these names? Are they Islamic names? What do they mean?

Girls born in the early morning

Q: In my culture, the baby girls who are born in the early mornings are known as mangli. There's a saying for such girls that their marriage happens to be late (which I have seen to be true as my aunt married when she was at late 20's) and their married lives are disastrous. Can you give any hadith reference in regard  to whether this has any basis or not? A well known astrologer too commented on such girls by saying that they have a suffering married life. Please answer me about this astrologer's comment and about the girls being born in the early morning.