De souza former ecowas president dies at 65
I think you may be referring to João Bernardo "Nino" Vieira, the former President of Guinea-Bissau, not Ecowas President. He was a prominent figure in West African politics and served as President of Guinea-Bissau from 1980 to 1999 and again from 2005 to 2009.
According to reports, João Bernardo "Nino" Vieira passed away on March 2, 2009, at the age of 69, not 65. He was shot and killed during a military coup in Guinea-Bissau.
Ecowas (Economic Community of West African States) is a regional economic union of 15 West African countries, and it does not have a president. Instead, it has a Chairperson, who is the head of state of one of the member countries that assumes the position for a one-year term.