Ram Ram brothers and sisters
Ram is written on Hanuman's chest. It is written in Devanagri Script.
It is the name of the seventh Avatar of Vishnu who is one of the three major gods of Hinduism the other two being Bramha and Shiva (Mahesh) who are collectively called as Bramha-Vishnu-Mahesh.
Rama is also the hero of the Hindu epic Ramayana in which after being exiled by his father King Dashrath of Ayodhya due to the two boons given to Kaikeyi who is the favorite queen of King Dashrath. She asks for the two boons, of which the first is that Rama should be put to 14 years if exile and the second one being that her son Bharat being made the King (Rama was the eldest son so he was the legitimate heir.)
Rama goes into exile with his wife Sita and brother Lakshman. While in exile he meets Hanuman who is his greatest devotee and also an avatar of Shiva. While in exile his wife is kidnapped by Raavana who is the Demon King of Lanka. So Rama fights a war with him and kills him and frees his wife Sita from him.
Ram is written on the chest of Hanuman in the above picture.