Thomas de Mowbray1366 - 1399 Born Sat, 22 March 1366 Epworth Died Sun, 22 September 1399 Venice Buried Venice Details Parents 1st Duke of Norfolk Thomas de Mowbray Lived 33 years, 6 months father John Mowbray 1340 - 1368 mother Elizabeth Segrave 1340 - 1375 Siblings Sister Margaret de Mowbray 1361 - 1404 Sister Joan de Mowbray 1363 - 1402 Sister Eleanor de Mowbray 1364 - 1417 Brother John de Mowbray 1365 - 1383