William Omar Landrón Rivera, (an haife shi 10 ga watan Fabrairu shekarar 1978) sananne da sunansa Don Omar, mawaƙi ne kuma ɗan wasan kwaikwayo na Puerto Rican . Wani lokaci ana kiransa sunayensu El Rey, da kuma Sarkin Sarakunan Reggaeton Music. A ranar 1 ga watan Satumba, shekarar 2017, ya ba da sanarwar cewa zai yi ritaya bayan wasu jerin wasannin kide kide da wake-wake a José Miguel Agrelot Coliseum a Puerto Rico, wanda aka shirya a ranar 15, 16 da 17 watan Disamba. Ya dawo waƙa a ranar 20 ga watan Afrilu tare da waƙarsa Ramayama tare da Farruko . Don Omar an haife shi ne a Santurce, dan asalin garin San Juan, Puerto Rico, inda aka haife shi, ɗan farin William Landrón da Luz Antonia Rivera. Daga farkon shekarunsa, ya nuna sha'awar kiɗan Vico C da Brewley MC. Lokacin da yake saurayi, ya zama memba mai aiki a majami'ar Furotesta, Iglesia Evangélica Returnuración en Cristo a Bayamón inda a wasu lokutan yake gabatar da wa'azin . Koyaya, bayan shekaru huɗu, ya bar cocin don keɓe kansa ga waƙoƙi.