Q. Who was the king of Thanesar, as well as the brother of Harshavardhana?
Answer:
Rajyavardhana
Notes: Harsha's brother, Rajya Vardhana, then the king at Thanesar. However, Shashanka, king of Gauda in Eastern Bengal, then entered Magadha as a friend of Rajyavardhana, but in secret alliance with the Malwa king. Accordingly, Shashanka treacherously murdered Rajyavardhana.