Geoffrey Swan is the husband of Helen Swan. He is the father of Charlie Swan and the grandfather of Bella Swan. He became the grandfather-in-law of Edward Cullen after his marriage to Bella, and the great-grandfather of Renesmee Cullen. He has had no role in the series.
It is mentioned in The Twilight Saga: The Official Illustrated Guide that he and Helen assumed they could not have children, so Charlie was an unexpected, but very welcome, surprise.
See also
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