The Sanskrit texts mention several legends about how Hanuman got his name. One legend is that Indra, the king of the deities, struck Hanuman's jaw during his childhood. The child received his name from the Sanskrit words Hanu ("jaw") and -man (or -mant). The name thus means "one with prominent or disfigured jaw". Another theory says the name derives from the Sanskrit words Han ("killed" or "destroyed") and maana (pride); the name implies "one whose pride was destroyed". 

 

According to one theory, the name "Hanuman" derives from the proto-Dravidian word for male monkey (ana-mandi), which was later Sanskritized to "Hanuman" (see historical development below). Linguistic variations of "Hanuman" include Hanumat, Anuman (Tamil), Anoman (Indonesian), Andoman (Malay) and Hunlaman (Lao).

Other names of Hanuman include:

Anjaneya,Hanumanta,

Anjaneya, Anjaniputra or Anjaneyudu or Hanumanthudu (Telugu), all meaning "the son of Anjana".

Anjaneyar, used widely by rural Tamilians.

Kesari Nandan ("son of Kesari")

Maruti ("son of Marut") or Pavanputra ("son of Pavan"); these names derive from the various names of Vayu, the deity who carried Hanuman to Anjana's womb

Bajrang Bali, "the strong one (bali), who had limbs (anga) as hard as a vajra (bajra)"; this name is widely used in rural North India.Bajrang Bali also implies "the strong one (bali), who is orange (Baj) or saffron colored

Sang Kera Pemuja Dewa Rama, Hanuman, the Indonesian for "The mighty devotee ape of Rama, Hanuman"

In addition, Hanuman has received several epithets, including:

Manojavam, the one who is swift as mind (appears in Ram Raksha Stotra)

Maarutatulyavegam, the one who has a speed equal to the wind God (appears in Ram Raksha Stotra)

Jitendriyam, the one who has complete control on his senses (appears in Ram Raksha Stotra)

Buddhimataamvarishtham, the one who is most senior among intellectuals (appears in Ram Raksha Stotra)

Vaataatmajam, the one who is the son of wind God (appears in Ram Raksha Stotra)

Vaanarayoothamukhyam, the one who is the chief of vanara army (appears in Ram Raksha Stotra). Similar in meaning to - Vaanaraanaamadheesham.

Shreeraamadootam, the one who is the messenger of Rama (appears in Ram Raksha Stotra).

Atulita Bala Dhaamam, the one who is the repository of incomparable strength.

Hemshailaabha Deham, the one whose body resembles a golden mountain.

Danujvana Krushanum, the one who is the destroyer of forces of demons.

Gyaaninaam Agraganyam, the one who is considered foremost among knowledgeable beings.

Sakala Guna Nidhaanam, the one who is the repository of all the virtues and good qualities.

Raghupati Priya Bhaktam, the one who is the dearest of all devotees to Lord Rama.

Sankata Mochana, the one who liberates (moca) from dangers (sankata)

In the 3rd chapter of Kishkindha Kaanda of Valmiki Ramayana, Rama describes many attributes of Hanuman's personality. Summarized as follows:

Ablest sentence maker.

Know-er of all Vedas and Scriptures.

Scholar in nine schools of grammars.

Possessing faultless speech and facial features