Perkuno
;)
(which probably meant 'striker'), known as Perkunas in Lithuania, Perkons or Perkonis in Latvia, was the Baltic thunder god. He was obviously connected with the Slavic god Perunu, although Perkuno was the standard European god of the storm. He was depicted as an angry-looking middle-aged man with a fiery face and a curly black beard. An order of priests is known to have maintained a perpetual fire as part of Perkuno's worship.
Baltic mythology appears to have possessed three main gods, not unlike the Germanic trio worshipped at Uppsala in Sweden. There the war god Odin, the thunder god Thor and the fertility god Freyr were revered, whereas at Romowe in Prussia, Baltic peoples gave worship to Patollo, Perkuno and Potrimpo. The young, beardless god Potrimpo was the Baltic Freyr; grim Patollo was the Baltic Odin; and the Baltic Thor was Perkuno, as quick to anger as the giant-killing Germanic thunder god. A late account of the Balts even supposes a migration from Sweden in the sixth century.
Unfortunately, next to nothing of Baltic mythology has survived, apart from the names of gods and goddesses. It is of considerable interest, therefore, that Perkuno appears in a surviving myth about Saule, the sun goddess, and the moon god Menu. According to this tale, the moon chose not to appear in the sky with the sun because of Perkuno, who had an affair with Saule. Their love-child was the Morning Star. Whereas the sun goddess carried on as if nothing had happened and continued to show herself to all humankind during the day, Menu made himself visible only by night.