Is jayant a proper compound noun?

The noun Jayant is a propernoun, the name of a person. A proper noun is always capitalized.

A compound noun is a Word made up of two or more Words that has a meaning of its own; for example bathtub, jack-o-lantern, United Kingdom, or Jayant Vishnu Narlikar, noted astrophysicist (the complete name is a compound noun).