arch·en·ceph·a·lon 
(är′kĕn-sĕfə-lŏn′)
(är′kĕn-sĕfə-lŏn′)n. pl. arch·en·ceph·a·la (-lə)
The part of the primitive embryonic brain from which the forebrain and midbrain develop.
- William Frederick
- William George
- William Gerald
- William H.
- William Harold
- William Harrison
- William Harrison
- William Henry
- William Henry
- William Henry
- William Henry
- William Henry
- William Henry
- William Henry Cavendish
- William Henry Fox
- William Henry Lytton Earle
- William Henry Pratt.
- William Hickling
- (William) Holman
- William Holmes
- William Howard
- William Howard
- William Howell
- William Hubbs
- William Hyde