You haven't provided your jurisdiction but in most jurisdictions you can marry your third cousin.
Certainly. Even first cousins can marry in about half the US jurisdictions and in many other countries. No place forbids marriage between third cousins.
There are no restrictions or laws that would make it a problem to date, or even marry, a third cousin.
NO! That would be the children of your mother or father's cousin, right? So you would have the same great-grandparents? Too close! Too many possibilities of recessive traits in that gene pool...
yes of course
you cannot marry your siblings, but you can marry your first cousin.
The grandchild of your father's first cousin and your child (your father's grandchild) are third cousins to each other. In the US, no jurisdiction prohibits such marriages.
No, Ohio does not permit the marriage of first cousins.
Yes. This is legal and socially acceptable.
Yes. Abigail Smith was his third cousin. This means that they shared the same great-great-grandparents.
Yes. Abigail Smith was his third cousin. This means that they shared the same great-great-grandparents.
You can, just not legally. Also you have problems if you want to date your cousin. It is also legal to marry your third cousin.
Whether you can marry your first cousin twice removed depends in part on the laws of the place where you propose to have the marriage performed. In most of the US, you can marry your first cousin, so marrying your first cousin twice removed would also be permitted.