Everyone came to the wedding, including a distant 'cousin' no one had heard from in years.
He's her 'first cousin'. = He and she are 'first cousins'.
He says politics and show business are 'kissing cousins'.
(..) The Wilkeses? Just as you'd expect with the barbecue tomorrow and talking nothing but war. Oh, bother the war. Was there anyone else there? Their cousin, Melanie Hamilton, from Atlanta and her brother, Charles. Melanie Hamilton! She's a pale-faced, mealy-mouthed ninny. I hate her. (..)1939 Gone with the Wind
(..) Why, honey, you can't do that to us. -How about if we tell you a secret? -A secret? Who about? Do you know Miss Melanie Hamilton from Atlanta? Ashley Wilkes' cousin. She's visiting the Wilkes'-- That goody-goody! Who wants to know a secret about her? Anyway, we heard, that is, they say-- (..)1939 Gone with the Wind