A licence to crenellate mansum infra manerium suum was granted by Edward II. to.    From Wordnik.com.  [A Pair of Blue Eyes] Reference

As they peered out they could see where the seamless undulations of the ice cap began to fracture and crenellate, forming a corrugated flow that seemed to ripple off towards the west.    From Wordnik.com.  [Crusader Gold]