Veera Ballala I (1102 - 1108 CE) was king of the Hoysala Empire. His rule was short and uneventful other than subduing the Chengalvas and the Santharas. It is claimed he made some unsuccessful attempts to overthrow the overlordship of the Western Chalukyas but was brought under control by Chalukya Vikramaditya VI.
References
Dr. Suryanath U. Kamat, A Concise history of Karnataka from pre-historic times to the present, Jupiter books, MCC, Bangalore, 2001 (Reprinted 2002) OCLC: 7796041