The Ramayana (a Sanskrit epic of ancient India that narrates the life of Rama, the prince of Kosala) does not mention the story of Anjana, married to Kesari and mother to Hindu god Hanuman.
Hanuman is a vanara belonging to the kingdom of Kishkindha. He is an ideal bhakta of Rama. He is born as son of Kesari, a Vanara king in Sumeru region and his wife Anjana. He plays an important part in locating Sita and in the ensuing battle. Hanuman is incarnation of Lord Shiva. 
