Czernobog / Bielebog

This is from Neil Gaiman's "American Gods" - a book I've developed a strong fetish for. The part where Shadow and Wednesday stay with the Russian gods is one of the best parts, where surrealism mixes with the reality of an old immigrant's household:

Czernobog shook his head. He looked up at Shadow. "Do you have a brother?"

"No," said Shadow. "Not that I know of."

"I have a brother. They say, you put us together, we are like one person, you know? When we are young, his hair, it is very blond, very light, his eyes are blue, and people say, he is the good one. And my hair it is very dark, darker than yours even, and people say I am the rogue, you know? I am the bad one. And now time passes, and my hair is gray. His hair, too, I think, is gray. And you look at us, you would not know who was light, who was dark."

"Were you close?" asked Shadow.