William Hacket (or Hackett) (died 1591), English puritan and religious fanatic
Sir Roger Jones, alderman and Sheriff of London for 1604 to 1605 married a sister of Cuthbert Hacket.
Meetings with Hacket at Milan and Cremona was believed to have influenced Lord Philip Howard, afterwards cardinal, to enter the order of St. Dominic.
Rossana Casale, a jazz singer along with American chorus singer Naimy Hacket, provided vocals on their records.