Janaan is of Arabic origin and means 'God is merciful'. It's a variant spelling of the more common Janan, both derived from the Arabic word 'rahma', meaning mercy.
"Janaa was quite popular in the early 2000s, with a peak of 9 births in 2004, but popularity declined thereafter until picking up again after 2016, with a recent high of 10 births in 2017. Overall, there have been 84 babies named Janaa since the year 2000."