No. A son-in-law is a contemporary.
You are not related to the parents of your son-in-law, although they are your son's parents-in-law. You share no common ancestor, however, you may share a common descendant.
There really is no relationship named or defined as cousin-in-law. If you and the son of this individual do not share a common ancestor you are not related at all.
There probably isn't a relationship. You do not share a common ancestor.
There is no relationship. The two of you do not share a common ancestor.
He is your nephew, and you are his uncle.
Technically, there is no relationship. You do not share a common ancestor. However, you may share common descendants.
She is the co-mother in law of you and your daughter's father in law is your co father in law. :-)
Joseph.
Christianity and Islam both have roots in Judaism. Abraham's son Issac was the ancestor of Jesus. Abraham's son Ishmael was the ancestor of Muhammad.
Use their first name. You aren't related as you do not share a common ancestor.
No. Your son-in-law's brother may be a son-in-law if he is married, but he is not your son-in-law.
Tigerclaw's ancestor is an ancestor of Skyclan, Gorseclaw, who is Cloudstar and Birdflight's son. And Spottedleaf is related to another ancestor of SkyClan, Spottedpelt, who is the sibling of Gorseclaw.