Sri Kumara Vyasa, the author of a poetical work on Mahabharatha, lived a few centuries ago. There is a belief among some followers of the Madhva school that he was influenced by Sri Vyasa Tirtha. Sri G.R.Patil, Dharwad, has penned a short article in Kannada giving a number of references from Kumara Vyasa’s work to show that he was an Advaitin and a Hari-Hara abheda vaadin. The article is available here for download:
http://www.mediafire.com/file/aecymg9usblvscs/KUMAARAVYASA%25281%2529.pdf/file