Renārs Kaupers (sometimes anglicised as Reynard Cowper; born 1 September 1974, in Jelgava) is a Latvian pop/rock singer, instrumentalist, and songwriter who is the vocalist of the band Prāta Vētra (known internationally as Brainstorm). Kaupers graduated from University of Latvia in 1996 with a degree in journalism. He can speak at least three languages with fluency: English, Latvian, and Russian. Kaupers' ancestors were probably Baron Friedrich von Stuart from Courland (1761–1842)