 A baronet (traditional abbreviation Bart, modern abbreviation Bt) or the rare female equivalent, a baronetess (abbreviation Btss), is the holder of a hereditary title awarded by the British Crown known as a baronetcy.The name baronet is a diminutive of the peerage title baron.The rank of a baronet is between that of a baron and a knight; it has never entitled the bearer to a seat in the House of Lords, but it is hereditary.