Barons of Knowles Created by Louis I, king of Portugal Decree date 15-02-1866 Decree date 19-02-1866 First holder John Knowles, 1st baron de Knowles Records #1 Holders Family filter On/Off 1 John Knowles, 1st baron de Knowles Sources Nobreza de Portugal e Brasil - 3 vols-vol. 2-pg. 664 Corrections and Updates To suggest a correction or an update. Click Here