The Bible doesn't tell us, but it does say that Adam and Eve had daughters (Genesis ch.5), so we can assume that Cain married one of his sisters. He would have had to, since that's all there would have been at the time. The law of Moses later said not to marry siblings, but that law was given much later than the time of Cain.
Ace Cain's birth name is Horace Truman Cain.
Erin Cain's birth name is Erin Elizabeth Cain.
Haven Cain's birth name is Haven Jude Cain.
Krisinda Cain's birth name is Krisinda Jeanette Cain.
Lamont Cain's birth name is LaMont Terome Cain.
Lynn Cain's birth name is Lynn Dwight Cain.
Sam Cain's birth name is Sam Wayne Cain.
If you are referring to Cain in the book of Genesis then nothing. Cain and Noel did not directly interact to my knowledge.
Cain Winstead's birth name is Richard Cain Winstead III.
adam is cain's father
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Cain = Qayin (קין)