Herbert was the son of Matthew Herbert of Swansea and was descended from an illegitimate son of
William Herbert, Earl of Pembroke. Herbert may have been educated at
Christ Church, Oxford, although this is questioned. He was admitted an honorary member of the
College of Doctors of Law in November 1573 and awarded an MA. He was awarded the degree of
Doctor of Civil Law by the
University of Oxford in 1587. In 1588, he was elected MP for
Gatton. He was elected MP for
Christchurch in 1593 and MP for
Bodmin in 1597. He was knighted in 1602. In 1604 he was elected MP for
Monmouthshire and sat until 1611. Herbert was of Neath Abbey. He died in Cardiff aged 67 on 9 July 1617, having fought a duel with
Sir Lewis Tresham two months earlier. He is buried in
St John the Baptist Church, Cardiff. Herbert married Margaret Morgan, daughter of William Morgan of Cefn Coch. ==French embassy of 1598==