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Geraldo Robotnik is the son of Gerald Robotnik, husband of Meredith Sanders, and father of Maria Robotnik. He is also the brother of Bertha Kintobor, brother-in-law to Ivo Kintobor, and uncle to Julian Kintobor and Colin Kintobor Sr. It is unknown whether he had any children other than Maria; if not, then the Robotnik family line ended with her. However, the name was later taken up by Gerald's nephew Julian and great-nephew Colin Kintobor Jr., who became Dr. Ivo Robotnik and Snively Robotnik, respectively. (CSE)