I love this most holy and powerful name. Think about it! Ra, as the sun god, has supported and maintained life throughout the millennia. Since time immemorial. This is a super heavy name. Truly splendid.
Though I'd say it's also a site for those interested in baby names, I agree with your observation. I'm particularly intrigued by two-letter names. Ra has a nice meaning, but besides that, it's not among my favourites. However, it's still used today in various forms and variations. It is a popular name in Egypt and many other countries, where within the language it holds a different sound and perspective.
Ra, aka Atan or Amonrey, god of the sun disk, was one of the most well known of the Egyptian pantheon. During the reign of the Pharaoh Akhenaten (he who serves the Sundisk), he was made into the only god, first known instance of monotheism.
Come on now, why would any sane person name their son after a sun god that has this strange-sounding one-syllable name that sounds like someone growling on a bad day or hurting themselves?
It's funny that Ra is symbolic of sun because in Te Reo Maori (indiginous language of New Zealand) Ra is also sun. There is a well known legend of how Maui captured the sun to make the days go slower as it liked to go very fast.