Baronet

A Baronet is not a baron or a baroness or the lands they hold. Instead it is a slightly lower British rank that lies between baron and knight on the Order of Precedence. Only the Knights of the Garter are above it. It is the lowest hereditary order.

It is also just outside of the SCA period as it was started by James I in 1611. However, it was sometimes used to refer to lesser barons (need confirmation!).