Cyndia

Cecelia/Cyndia (シンディア Shindia) is Pegasus's lost love. Cyndia first met him at a party thrown by his businessman father in Las Vegas fourteen years ago. Cyndia and Pegasus were married and Pegasus, an artist at the time, constantly drew pictures of his love. However, Cyndia died of a disease (This is the first time someone actually dies in the English version), and this prompted Pegasus to search for a way to bring her back, ultimately culminating in his acquiring of the Millennium Eye from Shadi. Pegasus' feelings towards his beloved were eventually revealed to Yugi Mutou and his friends after they found Pegasus' diary, which displayed his emotions.

A possible reason on why Cyndia's name was changed in the English anime is because "Cyndia Crawford" resembles "Cindy Crawford". ("Crawford" is also Pegasus' surname in the Japanese versions).