Good Luck Charlie Wiki
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Patrick John "Patty John" Duncan is the father of Frank and Mel Duncan, grandfather of Bob Duncan, grandfather-in-law of Amy Duncan, great-grandfather of PJ, Teddy, Gabe, Charlie, and Toby Duncan, and great-great-grandfather of Gabe Duncan Jr. PJ was named after him. He’s deceased. He is the oldest and furthest back known member of the Duncan Family.

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