Sri Kashishwar Pandita was a disciple of Sri Isvara Puri, the spiritual master of Lord Caitanya. Sri Isvara Puri ,in his last days, instructed his disciples Kashishwar Pandita and Govinda to render personal service to Sri Caitanya Mahaprabhu, which they accepted with their heart and soul. Sri Caitanya Mahaprabhu honored Kashishwar and Govinda, as His godbrothers,and hence was reluctant to allow them to serve Him But He finally complied as those were the orders of His spiritual master, Sri Isvara puri. So in Puri, Govinda took up the role of Sri Caitanya’s personal servant, whereas Kashishwar Pandita, being a very strong man, protected the Lord from the crowds while He visited the temple of Lord Jagannatha.
Anga seva govindere dilena ishvara
Jagannatha dekhite chalena aage kashishwar
(Caitanya Caritamrta – 10.141 , Adi)
Srila Prabhupada mentions in his Caitanya Caritamrta commentary, that among the prominent devotees of Lord Caitanya in Jagannatha Puri (Nilachal), Sri Kashishwar and Govinda were the eighteenth and nineteenth branches of Caitanya Mahaprabhu’s desire tree of devotional service. According to Gaura Gannodesha Dipika ,the former servants of Sri Krishna, Bhrngara and Bhangura in Vrindavana ,appeared as Kashishwar and Govinda in Lord Caitanya’s pastimes.