Complex sentence: Martin Aurell suggests in his "New Interpretation" the sword was made by Henry II for his son John Lackland, on occasion of investing John with lordship over Ireland (1177), the sword being the one with which the Irish giant Morholt was defeated.
Split into simpler sentences: Martin Aurell suggests the sword was made by Henry II for his son John Lackland, on occasion of investing John with lordship over Ireland (1177). The sword being the one with which the Irish giant Morholt was defeated.