If Jeff Bezos was born Jeff Jorgensen, why exactly was his last name changed? That is actually very easily explained. In 1968, Jacklyn Gise remarried to Miguel “Mike” Bezos. Mike Bezos was a Cuban immigrant to the United States. When Jacklyn married him, he adopted Jeff as his own son and Jeff’s last name was changed from Jorgensen to Bezos. More @Wikipedia
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