Bissau is a city and a municipality in Jhunjhunu district in the state of Rajasthan, India. Bissau is another town of fluctuating fortunes. Its original name was Vishala Jat Ki Dhani. Keshari Singh, son of Thakur Shardul Singh of Jhunjhunu, got this village in Jagir. In it, Keshari Singh constructed a war Fort and a defensive boundary wall for defence with four gates in each direction.He named it Bissau in 1746 AD. Keshari Singh belonged to the famous Panchpana or five sons of Thakur Shardul Singh in Shekhawati.