H = Humility and hopefulness
A = Admiration (truthfulness, devotion)
N = Nobility (sincerity, loyalty, modesty)
U = Understanding (knowledge)
M = Mastery over ego (kindness, compassion)
A = Achievements (strength)
N = Nishkama-karma (selfless work in service of God)

Sri Hanumanji is an incarnation of Lord Siva.

Brihaspati (the preceptor of the gods) had an attendant by the name of Punjikasthala who was cursed to assume the body of a female monkey. The curse was to be removed on her giving birth to an incarnation of Lord Siva. Accordingly, she was born as Anjana and, together with her husband Kesari (so named on account of his being as brave as a lion), lived a life of chastity and purity. She performed intense Tapasya (austerities) for a great many years, during which period she worshipped Lord Siva who being pleased with her granted her a boon. She asked that He (Lord Siva) be born to her so that she may be freed from the curse.