I've been wanting to know for a long time now... Why in the world is Johnny Zest's last name Zest if he was a part of the Landgraab family? If you don't already know his story, He was part of the Landgraab's family, believed to be adopted, why is his last name Zest? We're all wondering. Many believe it was because Johnny was adopted. Many others believe he got his name changed. to this day, it remains a mystery unspoken of by most. What do I believe myself? What I believe is his name is Zest because he was (believed) to been adopted, and not birthed by Nancy Landgraab herself. His last name was Zest BEFORE adoption is what I believe. What do you think?