Your second cousin is the grand child of the brother or sister of one of your grand parents.
Yes, all of your cousins are really related to you. A cousin is a person who is a child of the brother or sister of one of your ancestors.
No, your father's first cousin is the parent of your second cousin. Your second cousin is your father's first cousin, once removed.
Your second cousin's niece is the daughter of your second cousin's brother or sister. Your second cousin's brother or sister is also your second cousin, so this question is the same as "How are you related to the daughter of your second cousin."The daughter of your second cousin is your second cousin, once removed.
If your second cousin's mother is related to you, she is your first cousin, once removed. Remember that one of your second cousin's parents will not be related to you.
Your mother's second cousin is your second cousin, once removed.
Your second cousin's daughter is your second cousin, once removed.
Your second cousin's child is your second cousin, once removed.
Your second cousin is your parent's cousin's child. You and your second cousin share a great-grandparent (not a grandparent).
Your first cousin's second cousin may be your second cousin as well, or may not be related to you at all.
Your dad's second cousin's son is your third cousin.
Yes, all cousins, of whatever degree, are really related to you. Every cousin is a person who shares some ancestor with you. A second cousin once removed is more closely related to you than a second cousin twice removed and less closely related than a second cousin, or a first cousin.
Not only could your mother's second cousin be related to you, that person is related to you. Your are second cousins, once removed.
You and your mother's second cousin are second cousins, once removed.