_Ferdinand IV IVREA ____________+ | (1285 - 1312) _Alfonso XI BURGUNDY _| | (1311 - 1350) | | |_Constanza Dinisez of BURGUNDY _ | (1289 - 1313) _Sancho Alfonso IVREA _| | (1342 - 1373) | | | ________________________________ | | | | |_Eleanor of GUZMAN ___| | (1310 - 1351) | | |________________________________ | | |--Fernando Sanchez IVREA | (1373 - 1385) | _Afonso IV BURGUNDY ____________+ | | (1290 - 1357) | _Peter I BURGUNDY ____| | | (1320 - 1366) | | | |_Beatrice of IVREA _____________+ | | (1292 - 1359) |_Beatrice of BURGUNDY _| (1347 - 1381) | | ________________________________ | | |_Inês of CASTRO _____| (1325 - 1354) | |________________________________