@leyrann Galad has dark hair and was a child of Tigraine. Of course he is the son of Taringail and we know nothing about his appearance.

I just do not think it is impossible that the dark hair could come from that bloodline.

Little confused by the appearance comments. Rand has wetlander blood in him from his birth mother so the children having dark and blond hair is not that surprising. Plus nonidential twins (quadruplets in this case) are very common.

I do not think the appearance has anything to do with the oddness min describes.

Your other comments (though I think some are a bit wacky) however are very interesting!