Consanguinity: Just Call Them A Blessing

I have a linguistic question for anyone who can help.

Any decent language has special terms for all the members of one's family. In English we recognize only a very few of these. Mother, Father, Brother, Sister. So far so good.

Cousin (Is that a boy cousin or a girl cousin? Is it on the mother's side or the father's? Is it your father's sister's child, or your father's brother's child?)