I thought Windmill was borne of no man but was The Hybrid, the result of a demi-God being fused with Superman or something. Certainly that's the usual guff Wilder comes out with. OR his Dad could be Dustin Nichols. Certainly for a few rounds against Wilder Nichols was the Daddy (until he gave up because he couldn't be bothered and/or he had some super models to go and meet).