Vishnupurana 3.10.p3

3.10.p3

"Upon the tenth day after birth the father should give a name to the child, the first term of which shall be the name of a god and the second of a man as Sarman or Varman. The former is the proper designation of a Brāhmin, and the second of a Kshatriya. And the Vaiçyas and Sudras should have the designation of Gupta and Dāsha, A name should not be devoid of any meaning, should not be indecent, absurd, inauspicious nor dreadful. It should contain an even number of syllables; it should not be too long nor too short, nor too full of long vowels, but contain a due proportion of short vowels and be easily articulated.