
1) Agricultural god 2) Estonian god 3) Finnish boy name 4) Finnish god
Found on
https://www.crosswordclues.com/clue/ukko

in Finnish folk religion, the god of thunder, one of the most important deities. The name Ukko is derived from ukkonen, `thunder,` but it also means ... [1 related articles]
Found on
http://www.britannica.com/eb/a-z/u/3

In Finnish mythology, Ukko was king of the gods, successor to the first sky god Jumala. He was an elder of the universe, and his existence kept it in being and guaranteed its survival. He stayed aloof; the only signs of his presence mortals ever saw were rain clouds.
Found on
http://www.probertencyclopaedia.com/browse/DCU.HTM
No exact match found.