The name actually comes from an old English word — piebald — which meant 'white-headed' rather than hairless.
KDVR, Tiny Fox Lab

The bald eagle is not actually bald but has white feathers on its head. It’s name is derived from the word “piebald,” which refers to the eagle’s light and dark colored feathers. – Tiny Fox Lab Facts

Preview photo credit: KDVR
Source: bensguide.gpo.gov/j…