Raghupati Raghav Raja Ram is very famous in India ,

Raghupati Raghav Raja Ram (sometimes called Ram Dhun) is a popular bhajan (Hindu devotional song) that was a favourite of Mahatma Gandhi. These lyrics were taken from original hindu text "Shri Nama Ramayanam" written by Lakshmanacharya.

About Lord Ram:
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Rama is the seventh avatar of the Hindu god Vishnu, and a king of Ayodhya. Rama is also the protagonist of the Hindu epic Ramayana, which narrates his idealistic ideas and his greatness. Rama is one of the many popular figures and deities in Hinduism, specifically Vaishnavism and Vaishnava religious scriptures in South and Southeast Asia. Along with Krishna, Rama is considered to be one of the most important avatars of Vishnu. In a few Rama-centric sects, he is considered the Supreme Being, rather than an avatar.

Few Lines from Lyrics:
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Raghupati Raghav Rajaram
Patit Paavan Sitaram |5|

Sitaram Jai Sitaram \n
Bhaj pyare tu Sitaram ||2||

Raghupati Raghav Rajaram
Patit Paavan Sitaram |3|

Ishwar Allah Tere Naam
Sabko sanmati de Bhagwan |2|

Raghupati Raghav Rajaram
Patit Paavan Sitaram|3|

Sitaram Jai Sitaram
Bhaj pyare tu Sitaram ||2||

Raghupati Raghav Rajaram
Patit Paavan Sitaram|3|

Ishwar Allah Tere Naam
Sabko sanmati de Bhagwan |2|

Raghupati Raghav Rajaram
Patit Paavan Sitaram|3|

Sitaram Jai Sitaram
Bhaj pyare tu Sitaram ||2||

Raghupati Raghav Rajaram
Patit Paavan Sitaram|7|