Complex sentence: The legend might have been invented by the 10th century Paramara court poet Padmagupta, whose "Nava-Sahasanka-Charita" is the earliest source claiming an Agnivanshi origin for the Paramaras.
Split into simpler sentences: The legend might have been invented by Padmagupta, a 10th century court poet of the Paramara dynasty. His "Nava-Sahasanka-Charita" is the earliest source claiming an Agnivanshi origin for the Paramaras.