The man known under the pseudonym William D'Souza at Castle Hospital didn't know he had both. He suffered memory loss after being beaten at Kailua Beach Park on March 31.

D'Souza talked to his family by telephone yesterday, hospital officials said, in their first contact since March 31. And he learned what may be his real name: Philip Charles Cutajar.

A story in New York Newsday led Nassau County police Detective Al Anderson to eventually track down the man's mother and brother, Castle officials said.

"We have a tentative ID," said Honolulu police Detective Joe Self, who specializes in missing-person cases. "The brother, I talked to him. The brother said that's him by voice. No one has seen him."

The FBI is trying to match D'Souza's fingerprints with the new name for him, Self added. Positive identification must be made before D'Souza's occupation and other details can be released, Self said.

Police have learned he may have worked for the U.S. State Department.

State Department officials today confirmed a Philip Charles Cutajar worked for them as a foreign service officer from April 1985 to September 1989 and was assigned to London and Haiti, but declined to comment further.

D'Souza has had only scattered memories, many proved false, about his past, particularly the past nine years. He has been a Castle patient since he was found semiconscious at Kailua Beach - an apparent robbery victim without a wallet, watch or identification.

The break came Monday, after Newsday carried the story because D'Souza seemed to have specific recollections about Long Island, including what he believed to be the address of his family home.

Anderson made contact with current residents there. They recalled the previous owners and their two sons, who had moved 10 years earlier. Further inquiries led to telephone calls to D'Souza's mother, who has since moved to North Carolina, and a brother, who lives in Florida.

D'Souza, who has since spoken with both, learned his last name is not as he recalled.

The brother said D'Souza informed the family about four months ago he was going to the Caribbean to do humanitarian work and would be away indefinitely. Though concerned after not hearing from him, the family had not reported him missing or considered something was wrong, said Castle social worker Catherine Chinn.

D'Souza will remain in Castle housing until more details of his life are known.