My favourite boys name is Solomon partly for the nickname Solly! Such a cute nickname 
I’m probably going to repeat suggestions but I couldn’t not respond I love Marisol. I actually absolutely love the name Marisol. I also really like Solana, Souline, Soleil, Solange, Solveig, Solene, Solaris, Sorrel + Solvi.
Or maybe Sol Leonora ‘Solly’ could be an idea?
Hope this helps