Why is Lord Krishna called Govinda?

All our kids like Hanuman and enjoy his stories. Here is one story involving Hanuman from Ramayana.

Lord Rama was making Sethu Bandana (Sethu Bridge) across Indian Ocean to reach Lanka and rescue Seethamma. Sugriva along with his army chief Hanuman, Jambavan, Nal, Neel and others helped Lord Rama in his endeavor. Sugriva commanded all his army soldiers and chief to collect stones, rocks and mountains from all directions in order to construct the bridge.

Nal and Neel have got a boon that whatever they throw on sea will float. So they both were throwing all the stones and rocks that others bring on the ocean. Hanuman went to the north near Indraprastham in search of big mountain and found Govardhana Giri (Mountain). Govardhana Giri is a great Baktha and looking into each opportunity to serve for Lord Rama. Govardhana was very happy on seeing Hanuman and when Hanuman pleaded to take him for constructing Sethu Bandana, Govaradhana was immensely felt blessed.But suddenly some soldiers of Sugriva came to Hanuman, informing that Sethu Bandana is completed and it is time for us to march towards Lanka and rescue Seethamma.

On hearing this Govardhana felt very bad and thought that he is not fortunate enough to serve for Lord Rama. However Hanuman, being a Bhaktha could understand the feelings of another Bhaktha and assured him of conveying his Bhakthi to Lord Rama. As soon as he reached Rameswaram and saw Lord Rama, Hanuman described about Govardhana's bhakthi towards Him and how he felt bad for not getting a chance to serve Him. Lord Rama became very happy on hearing this, and gave a boon to Govardhana, that He will grace Govardhana by Uddharanam (lifting) when He takes Krishna avatar.

During Dwapara Yuga, Lord Krishna assured the people from saving Indra's anger and continuous rain in Vrindavanam and thus lifted Govardhana Giri which is located near Vrindavanam. Govardhana Giri felt blessed by His grace and realized that true Bhakthi will always be acknowledged by Lord. Indeed Krishna is named after this incident as Giridhara Gopala, who is the devoted Lord of Meera Bai. All Meera Bai songs refer to Giridhara Gopala and she sings how beautiful Lord Krishna is as a Giridhara Gopala in the below song.

This incident shows how true Bhakthi is valued and how fortunate Govardhana Giri to find place in another true Bhaktha, Meera Bai