No, Buddy Holly was not married to his cousin. This is a common misconception that stems from a misinterpretation of Holly's marriage certificate. Holly married Maria Elena Santiago in 1958, but her surname was mistakenly recorded as "Holmes," which was the surname of Holly's mother. This led some to believe that Holly had married his cousin, but this is not true. Holly and Santiago were not related, and their marriage was a legal and legitimate union.