hanuman dvadasha nama strotra is a short and powerful, easy to chant hymn of Hanuman comprised of twelve names indicating hanuman’s great qualities and his glories. The hymn given in chapter 55 of parāshara Samhitā.
This mantra is taught to sage Maitreya by sage parāshara and he prescribes to chant this hymn after chanting any mantra of Hanuman.