The generic name combines a reference to Morella with Greek ὀδών, odṓn, "tooth".

The specific name honours Victor Beltrán, the owner of the Vega del Moll S.A. Company exploiting the quarries, for his cooperation with the scientific research.

[1] Morelladon was one of eighteen dinosaur taxa from 2015 to be described in open access or free-to-read journals.

With the second and third sacral vertebrae the keel at the underside is limited to the front part of the vertebral body.

The lower end of the ischium has a D-shaped cross-section due to an extension on the outer side.