Barnum was produced by Candy’s Cresties out of Alphonse x Cutler.

Alphonse was produced by Emily Burke Artwork out of Clockwork [Northern Virginia Geckos] x Calico (Frank x Pandemic).
Clockwork was produced by Christie's reptile room out of Frank x Pandemic.
x
Cutler was produced by Candie’s Cresties and More out of Eyemouth (Rialto x Kryno) x Crestacean (Nuala x Citron).
Eyemouth was produced by Gecko Haven out of Rialto [Gorgeous Geckos] x Kryno. Crestacean was produced by ZenGex out of Nuala (Cal x Citron) x Jarvis [BFG]. Cal was produced by Giggle Geckos out of Sookie x Vincent.