This house belonged to my cousin, Katherine Hepburn.   What? I’ve never told you about Cousin Kate?   Well, actually, Katherine and I were only recently acquainted by ancestry.com, and they confirmed she and I had the same Grandmother. Well, great-great-great-great-great-great-great-great grandmother to me, and great-great-great-great-great-grandmother to her. (That’s eight generations for me and five…