At the time Winthrop became governor, his brother Nelson Rockefeller had been the governor of New York since 1959, and remained so throughout Winthrop's four years in office. They are often erroneously cited as the first two brothers to be governors at the same time, but they were actually the third case; the previous instances were Levi and Enoch Lincoln from 1827 to 1829, and John and William Bigler from 1852 to 1855. More recently, George W. and Jeb Bush were both governors from 1999 to 2000.