Is it OK to marry your second cousin once removed?
In the United States, second cousins are legally allowed to marry in every state. What's more, the genetic risk associated with second cousins having children is almost as small as it would be between two unrelated individuals.
Can you marry your first cousin once removed?
Several states of the United States prohibit cousin marriage. As of February 2014, 24 U.S. states prohibit marriages between first cousins, 19 U.S. states allow marriages between first cousins, and 7 U.S. states allow only some marriages between first cousins. Seven states prohibit first-cousin-once-removed marriages.
Are 2nd cousins blood related?
Second cousins share a great-grandparent, either maternal or paternal. Understanding second cousins is much the same as understanding first cousins, except the family tree must go back one further generation. If members of your family were adopted, your second cousins may not be blood related to you.