Tegbesu (French: Tegbessou) or Bossa Ahadee was a king of the Kingdom of Dahomey, in present-day Benin, from 1740 until 1774.

Oral traditions hold that Tegbesu was the son of Agaja and Hwanjile, a woman reported to have brought Vodun to the kingdom.

King Agaja had significantly expanded the Kingdom of Dahomey during his reign, notably conquering Allada in 1724 and Whydah in 1727.

[4] Historian Edna Bay notes that oral histories disagree about precisely who appointed Tegbesu as the new king.

Hwanjile, in particular, is said to have changed dramatically the religious practices of Dahomey by creating two new deities and more closely tying worship to that of the king.