User blog comment:Gmwbmw44/Why does everyone insist Lincoln's adopted?/@comment-31563773-20170718005119/@comment-25120277-20170718005702

And besides... Lincoln could've inherited his white hair from Pop Pop....

Considering we NEVER have seen pictures of Pop Pop as a young boy Lincoln's age, it can be hard to tell...

But, the likely theory is Pop Pop indeed had white hair at 11 and had it his whole life, just like Lincoln.