Rhyming Sibling Name for Parthiv

I really like the name Prithvi. It means earth too, but is a beautiful name. It doesn't rhyme, but like Parthiv, it starts with P and also means the same.

 

Sorry to be off topic. Every kid is unique. Do the names need to rhyme? Why can't he be his own person including his own name which is a major part of one's identity?

It may be a good idea not to contribute to a feeling of "second-fiddle" right out of the gate.