For the pronunciation "Pra-nav"
* प्रणव (Praṇava) This is the most common and traditional spelling, emphasizing the short "a" sound in the second syllable.
For the pronunciation "Pra-naav"
* प्रणाव (Praṇāva) This spelling uses the long "ā" sound for the second syllable, giving a more drawn-out pronunciation.
For the pronunciation "Pra-nav" with a longer "a" sound
* प्राणव (Prāṇava) This spelling utilizes the long "ā" sound in the first syllable, emphasizing a slightly longer "a" sound.
Ultimately, the best spelling depends on your desired pronunciation and the context of its use.
Remember that Sanskrit is written in Devanagari script, so the spellings above represent the script, not just the Roman transliteration.