ETYMOLOGY
from half + headed
EXAMPLE
“…And there is not a man that is for Paritie, all Fellows in the Church, but he is not for Monarchie in the State. And certainly either he is but Halfe-headed to his owne Principles, or he can be but Halfe-hearted to the House of David…”
From: Seven Sermons Preached Upon Severall Occasions
By William Laud, 1625
Lexicophilia 