No. Luke Skywalker is a fictional character.
Luke Skywalker's paternal grandparents are Shmi Skywalker and Cliegg Lars. Shmi Skywalker was Anakin Skywalker's mother, while Cliegg Lars was the husband of Shmi and the step-grandfather of Luke.
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Luke Skywalker
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Luke Skywalker
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Luke Skywalker
Luke Skywalker.
Cade is Luke's grandson.
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Luke Skywalker