Complex sentence: His father was granted a fair/market in Rathfriland in 1682, having been High Sheriff in 1675, his father was also an elder half-brother to Ulster King at Arms, William Hawkins.
Split into simpler sentences: His father was granted a fair/market in Rathfriland in 1682, having been High Sheriff in 1675. This Hawkins was an elder half-brother to Ulster King at Arms, William Hawkins.