The online database People of Medieval Scotland [PoMS] currently covers the years 1093-1314 but is being extended to 1371 to include the royal charters of Robert I (1306-29), David II (1329-71), and Edward Balliol (ruled in opposition, 1332-56). See
https://www.poms.ac.uk/ for details. PoMS is a joint project of the University of Edinburgh, University of Glasgow, and King's College London.