PERSON@1 , Prince of LOCATION@1 -LRB- NUMBER@1 September NUMBER@2 NUMBER@3 April NUMBER@4 -RRB- was the first son of King PERSON@2 of LOCATION@2 and PERSON@3 , and therefore , heir to the throne of LOCATION@2 and LOCATION@1 .

PERSON@4 -LRB- NUMBER@5 or NUMBER@6 September NUMBER@2 - NUMBER@3 April NUMBER@4 -RRB- was the oldest son of PERSON@2 and PERSON@3 .
