Oliver LaLa Feehan;80;of Westgate Manor;Monessen;died Monday;March 11;1996;in Monongahela Valley Hospital. Mr.Feehan was born on May 19;1915;in Monessen;a son of the late Thomas and Olive Ferguson Feehan. Presbyterian by faith;Mr.Feehan was a lifelong resident of Monessen. He was also a retired steward of the Charleroi Elks and a member of the Monessen Elks Lodge 733. Mr.Feehan was a sergeant with the U.S.Marine Corps and served in World War II during the Pacific Theater War. Mr.Feehan was the last surviving member of his immediate family. He is survived by cousins. Friends will be received Thursday from 2 to 4 p.m.and 7 to 9 p.m.at the Robert A.Billick Funeral Home Inc.on Grand Boulevard and Marion Avenue;Monessen;where funeral services will be held Friday at 11 a.m.with the Rev.Kenneth S.Johnson officiating. Burial will be in Belle Vernon Cemetery. The Robert A.Billick Funeral Home Inc.is in charge of the arrangements.