Yhyacinthe Mewoli Abdon (born 18 October 1985 in ) is a Cameroonian professional boxer. He competed in the lightweight event at the 2012 Summer Olympics and was eliminated in the round of 32 by Fazliddin Gaibnazarov. After his defeat, he was one of seven Cameroonian athletes who disappeared from the Olympic Village. He told media he wanted to stay in the UK to further his career. He was granted asylum and settled in Stockton-on-Tees.