*John (I) Baron Mowbray
born 4 September 1286 Thirsk, Yorkshire, England
died 23 March 1321 York, Yorkshire, England

father:
*Roger 1st Baron of Mowbray
born about 1257 Axholme Castle, England or Thirsk, Yorkshire, England
died 21 November 1297/8 Ghent, Flanders
buried Fountains Abbey

mother:
*Rohese (Rohesia) de Clare
born 17 October 1252 Tonbridge, Kent, England
died after 1316

siblings:
unknown

spouse:
*Aliva (Aline) de Braose
born about 1290 Gower, Glamorganshire, Wales
died before 20 July 1331 Swansea, Wales

children:
*John (II) Baron Mowbray
born 29 November 1310 Hovingham, Yorkshire, England
died 4 October 1361 York, Yorkshire, England

biographical and/or anecdotal:

notes or source:
LDS
ancestry.com