The dynasty reached its zenith under its last ruler Harsha Vardhana (c. 590 – c. 647 CE), whose empire covered much of north and north-western India, extending till Kamarupa in the east and Narmada River in the south.

The manuscripts of Harsha-charita use the variant "Pushpabhuti", but Georg Bühler proposed that this was a scribal error, and that the correct name was Pushyabhuti.

Harshacharita by the 7th century poet Bana gives a legendary account of their origin, naming Pushyabhuti as the dynasty's founder.

A devotee of Shiva, Pushyabhuti became involved in a tantric ritual at a cremation ground, under the influence of Bhairavacharya, a teacher from "the South".

[8][better source needed] The writings of Xuanzang and an 8th century Buddhist text, the Arya-manjushri-mula-kalpa suggest that the dynasty belonged to the Vaishya caste.

As a result of this marriage, Prabhakara's political status increased significantly, and he assumed the sovereign title Parama-bhattaraka Maharajadhiraja.

[19] Harsha eventually made Kanyakubja (modern Kannauj in Uttar Pradesh) his capital,[4] and ruled till c. 647 CE.