21.60
krsna kahena--’kon brahma, ki nama tahara?’
dvari asi’ brahmare puche ara bara
SYNONYMS
krsna kahena—Krsna said; kon brahma—which Brahma; ki nama tahara—what is his name; dvari asi’-the doorman, coming back; brahmare—to Lord Brahma; puche—inquires; ara bara—again "When Krsna was so informed, He immediately asked the doorman, ’Which Brahma? What is his name?’ The doorman therefore returned and questioned Lord Brahma.
PURPORT
From this verse we can understand that Brahma is the name of the post and that the person occupying the post has a particular name also.
From Bhagavad-gita: imam vivasvate yogam.
Vivasvan is the name of the present predominating deity of the sun.
He is generally called Surya, the sun-god, but he also has his own particular name.
The governor of the state is generally called raja-pala, but he also has his own individual name.
Since there are hundreds and thousands of Brahmas with different names, Krsna wanted to know which of them had come to see Him.