The name Mika is a boy's name . Mika and is often added to user-created lists like Malus - Post Apocalyptic Dystopia Character Names and discussed in our forums with posts like "A brother or sister for little Jack or Olivia".
From the experts:
This short form of Mikael, a variation of Michael, may originate in Scandinavia but it's most popular in Germany and The Netherlands. Mika can make a cute and original way to honor a Michael in the family, but be prepared for a lot of people pronouncing it with a long i as in Mike.