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Isner in 2010, photo by kathclick /Bigstock.com
Birth Name: John Robert Isner
Place of Birth: Greensboro, North Carolina, U.S.
Date of Birth: April 26, 1985
Ethnicity: English, Irish, German
John Isner is an American professional tennis player. He is 6′10″.
He is married to jewelry designer Madison McKinley, with whom he has four children.
John’s maternal grandfather was named Will Hobbs.
John’s maternal grandmother was Betty White (the daughter of Henry White and Julia McPherson). Betty was born in Irvin, North Carolina.
Sources: http://www.tennis.com
Obituary of John’s maternal grandmother, Betty White Hobbs – http://obits.dignitymemorial.com